The sum of six fifths 6 5 and six timessix times a number is equal to four fifths 4 5 subtracted from seven timesseven times the number. Find the number.

Answer:

Students got 3 signature on the first day.

Step-by-step explanation:

We are given the following in the question:

The number of signatures they get each day is 3 times as many as the day before.

Thus, the number of signature forms a G.P with common ratio, r = 3.

The expression 3 to the 6th power represents the number of signatures they got on the sixth day. Thus we can write:

[tex]a_6 = 3^6[/tex]

The [tex]n^{th}[/tex] term in a G.P is given by

[tex]a_n = a_1r^{n-1}[/tex]

where [tex]a_1[/tex] is the first term in the G.p

Putting values, we get,

[tex]3^6 = a_1(3)^{6-1}\\3^6 = a_1(3)^5\\\Rightarrow a_1 = 3[/tex]

Thus, the first term of G.P is 3.

Hence, students got 3 signature on the first day.

Answer:

I = 0.0631 W/m²

Step-by-step explanation:

Value in Decibel = 10 Log [tex]\frac{I}{10^{-12} }[/tex]

108 / 10 = Log [tex]\frac{I}{10^{-12} }[/tex]

10.8 = Log [tex]\frac{I}{10^{-12} }[/tex]

[tex]\frac{I}{10^{-12} }[/tex] = [tex]10^{10.8}[/tex]

I =  [tex]10^{10.8}[/tex] x [tex]10^{-12}[/tex]

I = 0.0631 W/m²

Answer:

Therefore the team saves $5.18.

Step-by-step explanation:

i) there are two triangular pyramids

ii) the base of each pyramid is an equilateral triangle with an area of 10.8 square feet.

iii) the base of the pyramids are not covered with foil.

iv) since there are two pyramids the total area not covered

    = 10.8 [tex]\times[/tex] 2 = 21.6 square feet

v) the cost of foil = $0.24 per square foot.

vi) the team save altogether by covering only the lateral area of the two pyramids

  =  21.6 [tex]\times[/tex] 0.24 = $5.18

Therefore the team saves $5.18.

0.75 hours more is needed to practice to meet his goal

Solution:

Given that,

Goal per week of Joel = [tex]4\frac{1}{2} = \frac{2 \times 4 + 1}{2} = \frac{9}{2}[/tex]

From given,

The list below shows the number of hours Joel has a practiced so far for the week

[tex]Monday = 1\frac{1}{2}\ hours = \frac{3}{2}\ hours[/tex]

[tex]Wednesday = 1\frac{1}{4}\ hours = \frac{5}{4}\ hours\\\\Thursday = 1\ hour[/tex]

How many more hours does he need to practice this week to meet his goal

Find the difference

Hours needed = Goal per week of Joel - (monday + wednesday + thursday)

[tex]Hours\ needed = \frac{9}{2} - (\frac{3}{2} + \frac{5}{4} + 1)\\\\Hours\ needed = 4.5-(1.5+1.25+1)\\\\Hours\ needed = 4.5 - 3.75 = 0.75\\\\Hours\ needed = 0.75 = \frac{3}{4}[/tex]

Thus 0.75 hours more is needed to practice to meet his goal

Joel needs to practice \( \frac{3}{4} \) hours more this week to meet his goal.

First, we need to calculate the total number of hours Joel has practiced so far. We will add the hours practiced on Monday, Wednesday, and Thursday.

[tex]Monday: \( 1 \frac{1}{2} \) hours = \( 1 + \frac{1}{2} \) hours = \( \frac{3}{2} \) hours[/tex]

[tex]Wednesday: \( 1 \frac{1}{4} \) hours = \( 1 + \frac{1}{4} \) hours = \( \frac{5}{4} \) hours[/tex]

[tex]Thursday: \( 1 \) hour = \( \frac{4}{4} \) hours (to keep the denominator consistent)[/tex]

Now, let's add these hours together:

[tex]\( \frac{3}{2} + \frac{5}{4} + \frac{4}{4} = \frac{6}{4} + \frac{5}{4} + \frac{4}{4} = \frac{15}{4} \) hours[/tex]

Joel's goal is to practice [tex]\( 4 \frac{1}{2} \)[/tex] hours per week, which is [tex]\( 4 + \frac{1}{2} \) hours = \( \frac{8}{2} + \frac{1}{2} \) hours = \( \frac{9}{2} \) hours.[/tex]

To find out how many more hours Joel needs to practice, we subtract the total hours he has already practiced from his goal:

[tex]\( \frac{9}{2} - \frac{15}{4} \)[/tex]

To subtract these fractions, we need a common denominator, which is 4:

[tex]\( \frac{18}{4} - \frac{15}{4} = \frac{3}{4} \) hours[/tex]

Therefore, Joel needs to practice [tex]\( \frac{3}{4} \)[/tex] hours more to meet his weekly goal.

Answer:

In Mozambique a currency crisis led the government to mandate that citizens from Mozambique could only spend up to $13,600 on their credit or debit cards when shopping abroad. This is an example of a(n) ______________.

A. import tariff

B. quota

C. self-reference criterion

D. embargo

E. exchange control

The correct answer is E. exchange control

Step-by-step explanation:

Exchange controls are government imposed controls on the selling, buying or transfer of foreign currencies by residents of the country and on the selling and buying of the country's local currency by nonresidents, as well as control of cross border currency transfer.

Exchange contrl is meant for in-country economic management to prevent exchange rate volatility and is common in countries with developing economies.

Generally types of exchange controls are as follows:

1.  Allowing foreign exchange transaction through only government approved channels

2. Placing a ban on the possession of foreign currency

3. Placing a ban on the use of foreign currency within the country

4. setting fixed exchange rates

5. Placing a restriction on the amount of currency flow across border

Answer: C. Keeps taxes lower for Georgians

Step-by-step explanation:

Since the road system allows the bulky products to be shipped inexpensively this must apply that the taxes are lower for georgians otherwise this might not have been the case.

Answer:

B

Step-by-step explanation:

i just did it

The question involves creating numerical expressions to represent the total number of fruits in a basket after adding 4 peaches. By assuming the initial fruit count as x, two expressions are x + 4, representing the total number of fruits, and 2(x + 4), indicating a scenario where the total fruit count doubles after adding the peaches.

The question asks for two new numerical expressions to represent the total number of fruit in the basket, given that Paul added 4 peaches. To create these expressions, we need to assume there was an initial number of fruit in the basket before Paul added the peaches. Let's denote the initial number of fruit as x. Therefore, our two new numerical expressions could be:

These examples show how basic algebraic expressions can be used to represent situations involving changes in quantity.

Answer:

Step-by-step explanation:

Answer: the ladder would be long enough.

Step-by-step explanation:

The ladder forms a right angle triangle with the wall of the building and the ground. The length of the ladder represents the hypotenuse of the right angle triangle. The height from the window to the base of the building represents the opposite side of the right angle triangle.

The distance from the bottom of the ladder to the base of the building represents the adjacent side of the right angle triangle.

To determine if a 12 foot ladder is long enough to reach the window, we would apply Pythagoras theorem which is expressed as

Hypotenuse² = opposite side² + adjacent side²

Let h represent the height that the ladder would get to. Therefore

12² = h² + 3²

144 = h² + 9

h² = 144 - 9 = 135

h = √135 = 11.62 feet

Since the height of the window is 10 feet above the ground, the ladder would be long enough.

Answer:

c.square root of 28

Step-by-step explanation:

Answer:

Step-by-step explanation:

We would apply the formula for determining compound interest which is expressed as

A = P(1+r/n)^nt

Where

A = total amount in the account at the end of t years

r represents the interest rate.

n represents the periodic interval at which it was compounded.

P represents the principal or initial amount deposited

From the information given,

A = 7614

r = 10% = 10/100 = 0.1

n = 1 because it was compounded once in a year.

P = 3673

Therefore,

7614 = 3673(1+0.1/1)^1 × t

7614/3673 = 1.01^t

2.073 = 1.01^t

Taking log of both sides, it becomes

Log 2.073 = log 1.01^t

0.3166 = t × 0.0043

t = 0.3166/0.0043

t = 73.3

Answer: The answer is A

Step-by-step explanation: Add the coefficient of x to the both sides.

X²+4x=12

X²+4x+4=12+4

X²+4x+4=16

X²+2x+2x+4=16

X(x+2)+2(x+2)=16

(X+2)(x+2)=16

(X+2)²=16

The equivalent equation is  (x+2)²=16

A quadratic equation can be written in the standard form as ax2 + bx + c = 0, where a, b, c are constants and x is the variable. The values of x that satisfy the equation are called solutions of the equation, and a quadratic equation has at most two solutions.

Given here: The expression x²+4x-12=0

Thus simplifying the equation we get

x²+2.2x+4-12-4=0

(x+2)²-4²=0

(x+6) (x-2)=0

x=-6,2

or the equation can also be rewritten as (x+2)²=16

Thus the equivalent equation is  (x+2)²=16

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Answer:

Special Lenses For Special Effects. ... These specialty lenses may be designed with movable focal planes for amazing depth of field, or built to focus extremely close to tiny subjects for macro enlargements, or even to produce a specific type of soft focus that's flattering for portraits

The meaning of photo editing is the act of altering an image, simply put. But that’s oversimplifying a subject which is quite complex.

For example, some photo editing techniques are done manually, while others are conducted through automated software. Some photo editing is even done offline, on actual photographs, posters or other printed collateral.

Other terms for photo editing:

Image editing

Post-processing

Image/photo manipulation

Photoshopping

Image/photo enhancement

Explanation:

so they both are alike because they can both be used to edit photos and both are great to use

Step-by-step explanation:

They both are alike because they can both be used to edit photos and both are great to use.

The procedure used to change a picture, including digital photography, analog photography, and graphics is referred to as image editing.

Special Lenses For Special Effects. These specialty lenses may be designed with movable focal planes for amazing depth of field, built to focus extremely close to tiny subjects for macro enlargements, or even to produce a specific type of soft focus that's flattering for portraits.

The meaning of photo editing is the act of altering an image, simply put. But that’s oversimplifying a subject that is quite complex.

For example, some photo editing techniques are done manually, while others are conducted through automated software. Some photo editing is even done offline, on actual photographs, posters, or other printed collateral.

Other terms for photo editing:

Image editing

Post-processing

Image/photo manipulation

Photoshopping

Image/photo enhancement

Therefore, both are alike because they can both be used to edit photos and both are great to use.

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Answer:

(C) X<5

Step-by-step explanation:

Set of all old integers less than 5=(1,3)

X will represent this in inequality :

X<5.

Therefore, the answer is C.

Answer: a) yNA/100

b) NA(y-x)/100

c) (NA)/B

Step-by-step explanation:

a) The total amount of dollars owned by the shares' owner = N number of shares × A dollars per share = NA dollars

This total is then transferred to buy B shares which then appreciates by y%.

The amount of increase in portfolio from January to June = y% of total dollars invested = y% of NA dollars = yNA/100

b) If the shares were left with A, the increase in portfolio from January to June would be x% and = x% of the total Dollar amount = x% of NA dollars = xNA/100

How much more money made in that time would be the difference in interest, between taking the dollars to invest in share B or keeping the dollars on investment A

That is, (yNA/100) - (xNA/100) = NA(y-x)/100

c) Total dollars available after sale of the A stock = NA

Number of B stock this dollar can buy = Total dollars available/amount of B stock per share

That is, (NA)/B

QED!

Answer:

Each boy gets approximately Rs 13.09                                              

Step-by-step explanation:

We are given the following in the question:

Total money = Rs 144

Let x be the amount each girl gets and y be the amount each boy gets.

The money is distributed among 2 boys and 3 girls. Thus, we can write:

[tex]3x + 2y = 144[/tex]

Also, each girl gets three times as much as each boy gets.

Thus, we can write:

[tex]x = 3y[/tex]

Substituting these values, we get,

[tex]3(3y) + 2y = 144\\11y = 144\\\\y =\dfrac{144}{11} \approx 13.09\\\\x = 3(\dfrac{144}{11}) \approx 39.27[/tex]

Thus, each boy gets approximately Rs 13.09

Answer: each boy should get $39.27

Step-by-step explanation:

Let x represent the amount that each boy should get.

Let y represent the amount that each girl should get.

The total amount of money that would be distributed among the 2 boys and 3 girls is 144 Rs. This is expressed as

2x + 3y = 144 - - - - - - - - - - - -1

The money is shared in such a way that each girl gets three times as much as each boy gets. This is expressed as

y = 3x

Substituting y = 3x into equation 1, it becomes

2x + 3 × 3x = 144

2x + 9x = 144

11x = 144

x = 144/11 = 13.09

y = 3x = 3 × 13.09

y = $39.27

Triangle ABC is similar to triangle CEF.

Explanation:

Diagram is inserted for the reference.

ABCD is a rectangle.

ABC is a right angled triangle because all the angles of the rectangle are 90◦ - (a)

CEF is a right angled triangle because FE is perpendicular to DC – (b)

In triangles ABC and CEF,

1. Angle ABC = Angle CEF = 90◦ (Both are right angles from a and b)

2. Angle BCA = Angle EFC (Alternate angles on parallel lines are equal on intersection)

Hence using Similarity property of AA (Angle, Angle), Triangle ABC and CEF are similar.

ΔABC and ΔCEF are similar triangles by the AA similarity theorem.

The angle-angle similarity theorem (AA) states that when two triangles have two pairs of corresponding congruent angles, both triangles are similar triangles.

In ΔABC and ΔCEF, we have the following:

Two pairs of corresponding congruent angles - ∠FEC ≅ ∠ABC (right angles) and ∠FCE ≅ ∠BAC

Therefore, ΔABC and ΔCEF are similar triangles by the AA similarity theorem.

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Answer:

a. 0.26

b. 0.7

c. 0.38

Step-by-step explanation:

For a)

For sponsored studies: 62 %  found the products favorable. The percentage is 0.62.

For non-sponsored studies 46% found the products favorable. The percentage is 0.46

Total probability = P(A) × P (B)

                           = 0.46 × 0.62

                           = 0.2604

For b)

Probability for the food industry = 0.7

For c) 1 - ( 0.62) = 0.38

The overall probability that a participant finds the product favorable is 57.2%. If the product was found favorable, the probability the study was industry-sponsored is 75.8%. If the product was found unfavorable, the probability the study was not industry-funded is 71.7%.

The first step to answer the given question is understand that this is a problem of conditional probability, related to the concept of favorability or unfavorability towards products based on industry-sponsored studies and non-sponsored studies.

To find the overall probability of a participant finding the product favorable, we add the probabilities of a product being favorable under both industry funding and no industry funding, weighted by their respective chances of occurrence.

To work out the conditional probabilities:

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Answer: FALSE

Step-by-step explanation: Statistics is the Science of collecting, organising,sumarising,analysing information to reach at a reasonable conclusion or outcome. Statistics also helps to measure levels of confidence in any conclusion or outcome.

Statistics has been applied in several fields like Medicine, pharmacy, Engineering,Biology etc it helps in determining especially in numerical representation the impact of certain conditions or activities or information.

Answer:

Hence The composition [tex](fog)(x)[/tex] of the given function is [tex]x^2+12x+29[/tex].

Step-by-step explanation:

Given:

[tex]f(x) = x^2+2x-6[/tex]

[tex]g(x)=x+5[/tex]

We need to find [tex](f o g)(x)[/tex].

Solution:

Now we can say that;

[tex](f o g)(x)[/tex] = [tex]f(g(x))[/tex]

[tex](fog)(x) = (x+5)^2+2(x+5)-6[/tex]

Now Applying distributive property we get;

[tex](fog)(x) = (x+5)^2+2\times x+2\times5-6\\\\(fog)(x) = (x+5)^2+2x+10-6\\\\(fog)(x) = (x+5)^2+2x+4[/tex]

Now Solving the exponent function we get;

[tex](fog)(x) = x^2+2\times x\times 5+5^2+2x+4\\\\(fog)(x) = x^2+10x+25+2x+4\\\\(fog)(x) = x^2+12x+29[/tex]

Hence The composition [tex](fog)(x)[/tex] of the given function is [tex]x^2+12x+29[/tex].

Answer:

If you`re trying to figure out how many gifts Maggie can get without the fee going over the budget, then I would say that she can buy 3 gifts. 4 times 3 is 12, and when you add 7 it equals 19. Of course, if 3 is pushing it, Maggie can also buy 1 or 2 gifts, and she`d be fine. Hope this helps!

Step-by-step explanation:

Answer:

August=$350

September=$560

October=$210

November= $280

Step-by-step explanation:

Total amount left to save $1400.

We calculate the amount save each mount since we are already given the percentages.

For the month of August she saves 25% of $1400, we convert the percentage to equivalent cash

[tex]\frac{25}{100}*1400\\=350[/tex]

for the month of August, she saved $350,

Next For the month of September she saves 40% of $1400, we convert the percentage to equivalent cash

[tex]\frac{40}{100}*1400\\=560[/tex]

for the month of September, she saved $560,

Next For the month of October she saves 15% of $1400, we convert the percentage to equivalent cash

[tex]\frac{15}{100}*1400\\=210[/tex]

for the month of October, she saved $210,

total amount saved by October = $350+$560+$210=$1120

Amount saved by November=1400-1120=$280

Answer:

(A)  [tex]f=\frac{k}{L}[/tex]

(B) Frequency becomes half.

Step-by-step explanation:

We have been given that the frequency f of vibration of a violin string is inversely proportional to its length L. The constant of proportionality k is positive and depends on the tension and density of the string.

(A) We know that two inversely proportional quantities are in form [tex]y=\frac{k}{x}[/tex], where y is inversely proportional to x and k is constant of proportionality.

Upon substituting our given values, we will get:

[tex]f=\frac{k}{L}[/tex]

Therefore, our required equation would be [tex]f=\frac{k}{L}[/tex].

(B) For part, we have been given that length is twice, so our new frequency will be [tex]f_n[/tex] and new length [tex]L_n[/tex] is [tex]2L[/tex].

Upon substituting [tex]2L[/tex] in our equation as:

[tex]f_n=\frac{k}{L_n}[/tex]

[tex]f_n=\frac{k}{2L}[/tex]

[tex]f_n=\frac{1}{2}\cdot \frac{k}{L}[/tex]

[tex]f_n=\frac{1}{2}\cdot f[/tex]

Upon comparing [tex]f_n[/tex] with [tex]f[/tex], we can see that [tex]f_n[/tex] is half the value of [tex]f[/tex].

Therefore, the frequency of vibration of violin gets half, when we double the length of the string.

The frequency f of a vibrating string is represented by the equation f = k/L, where k is a constant and L is the string's length. If the length of the string is doubled, the frequency of the string's vibration is halved due to the inverse relationship.

(A) Considering the problem describes the frequency f of a vibrating string being inversely proportional to its length L, we can represent this information mathematically with the equation f = k/L, where k is a constant of proportionality. This constant is positive and depends on the tension and density of the string.

(B) Because frequency and length are inversely proportional, if you double the length of the string (L), the frequency (f) will halve. This is due to the inverse relationship, with the longer string taking more time to complete each vibration and thus reducing the frequency of vibration.

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Answer:

There is a strong, negative correlation between the amount of money in Tara's account and the day of the month.

Step-by-step explanation:

r is between -1 and +1.  r values close to -1 are strongly negative.  r values close to +1 are strongly positive.  r values close to 0 are weak.

r = -0.9870 is strongly negative.  So there is a strong, negative correlation between the amount of money in Tara's account and the day of the month.

Final answer:

The correlation coefficient r = -0.9870 shows a strong, negative correlation between the day of the month and the amount of money in Tara's account, meaning as the days pass, her account balance generally decreases. So, the correct statement is 'There is a strong, negative correlation between the amount of money in Tara's account and the day of the month.'

Explanation:

The correlation coefficient, denoted as r, measures the strength and direction of the linear relationship between two variables. Given that the correlation coefficient in the scenario is r = −0.9870, this indicates a strong, negative correlation between the amount of money in Tara's account and the day of the month. This means that as the days of the month increase, the amount of money in Tara's account tends to decrease, and this pattern is quite consistent, considering the high absolute value of the coefficient, which is close to -1.

In this exercise we have to use the knowledge of finance to identify the best cost benefit is to buy a new car or a used car, thus we find that:

The new car costs more, that can be prove if;

Manny drives an average of 110 miles per week with his old car. The old car gets 16 miles per gallon. The cost per gallon is [tex]\$2.65[/tex] repair and maintainance costs an average of [tex]\$740[/tex] per year. For the old car, to find the amount spent on the car we have:

[tex](110/16) * (2.65) = \$18.21875 / week[/tex]

There are 52 weeks in a year. We have:

[tex](10.21875)*(52) = \$ 947.375\\947.375 + 740 = \$1687.375\\(1687.357) * (3) = \$5062.125[/tex]

The new car cost [tex]\$6500[/tex] over a three year loan process. The car gets 28 miles per gallon. It requires a maintenance of [tex]\$10[/tex] per month. For the new car to find the amount, we have:

[tex](110)*(28) * (2.65) *(52) = \$541.357\\541.357 + 10*(12) + 6500 = \$ 7161.357[/tex]

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Answer:

The answer to this question is the wall is 45.95 yards tall

Step-by-step explanation:

To solve this, we list out the given variables and the unknowns thus

Height of ball at launch = 8 yards

Distance of net from the ball = 80 yards

Distance of the wall down the path = 75%

Maximum height of the ball= 80 yards

equation of Motion of the ball = parabolic motion =

v² = u² - 2gS

S = 80 - 8 = 72 yards

at maximum height v = 0 thus u² = 2×9.81×72 =1412.64

u = 37.59 m/s

also v = u - gt and again at max height v = 0

Therefore 37.59 = 9.81×t or t = 3.83 s

If the motion of the ball is free of obstruction then time of flight before the ball just reaches the 8 yards off the ground = 3.83×2 = 7.66 seconds

Taking the initial velocity as zero at maximum height and from the equation

S = ut + 0.5×gt² we get, where S is the heigt of the ball from touching the actual field ground which is 80 yards we have

80 = 0.5×9.81×t²

so that t² = 2×80÷9.81 = 16.31 or t = 4.04s

Therefore the total time of flight = 4.04 + 3.83 = 7.87 seconds

if the ball is considered as having a constant horizontal velocity, therefore

at 75% of the way the time it took will be 0.75×7.87 = 5.9 seconds

However time it took  the  ball to reach maximum height and then starts descent = 3.83s, and the time at which the ball is directly over the wall = 2.07 seconds on the second half just after reaching mximum height

Thus at 2.07 seconds the distance trvelled from the maximum height is

S = ut +0.5gt² as before where u = 0

hence S = 0.5×9.81×2.07² = 21.05 yards or (80 -21.05) yards off the ground =  58.95 yards

As stated in the question, the ball cleared the wall by 13 yards therefore the height of the wall is 58.95 - 13 = 45.95 yards

The statement 'the number of new clients (x) is 154% of the number of old clients (y)' can be translated into a linear equation in the standard form 'ax + by = c' as '-1.54y + x = 0' or '-154y + 100x = 0' where a, b, and c are constants.

To translate the given statement into a linear equation, we need to interpret the percentages as a ratio. When we say 'the number of new clients (x) is 154% of the number of old clients (y)', it means 'x is equivalent to 1.54 times y'. So, we can write that as a linear equation:

x = 1.54y

However, that's not in the form 'ax + by = c'. To get it into that form, we can write it as:

Or alternately you might prefer, if you wish to avoid decimals:

Where a = -154, b = 100 and c = 0.

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Answer:

i am pretty sure it is B

Step-by-step explanation:

Answer:

3 packeges of Pamphlets and 5 packages of dog biscuits.

Step-by-step explanation:

Peter have to distribute a pamphlet with one dog buscuit to each person they need equal amount of pamphlets and biscuitsby taking LCM of both 12 and 20 theanswer is 60. Peter needs 60 pamphlets and 60 dog biscuits. So he require 3packages of pamphlets  and 5packages of dog biscuits.

Answer:

(x+8)² + (y+13)² = 169

Step-by-step explanation:

Equation of circle:

(x-h)² + (y-k)² = r²

(h,k) is the centre, r is the radius

(x-(-8))² + (y-(-13))² = 13²

(x+8)² + (y+13)² = 169

Answer: the equation of the circle is

(x + 8)² + (y + 13)² = 169

Step-by-step explanation:

A circle is the set of all points in a plane equidistant from a fixed point called the origin or center.

The center of the circle is (-8, -13)

The formula for determining the equation of a circle us expressed as

(x - h)² + (y - k)² = r²

Where

r represents the radius of the circle

h and k represents the x and y coordinates of the center of the circle. Comparing with the given points,

h = - 8 and k = - 13

Radius, r = 13

Substituting into the formula, it becomes

(x - h)² + (y - k)² = r²

(x - - 8)² + (y - - 13)² = 13²

(x + 8)² + (y + 13)² = 169

Answer:

12%

Step-by-step explanation:

0.9/7.5 *100

= 12%

Answer: a drink costs $5.5

Step-by-step explanation:

Let x represent the cost of one bag of popcorn.

Let y represent the cost of one drink.

Kylie spends a total of $125.50 on 12 bags of popcorn and 7 drinks. This means that

12x + 7y = 125.50 - - - - - - - - - - 1

Amelia spends a total of $87.50 on 6 bags of popcorn and 8 drinks. This means that

6x + 8y = 87.50 - - - - - - - - - -- - - 2

Multiplying equation 1 by 1 and equation 2 by 2, it becomes

12x + 7y = 125.50

12x + 16y = 175

Subtracting, it becomes

- 9y = - 49.5

y = - 49.5/ - 9

y = 5.5

Substituting y = 5.5 into equation 2, it becomes

6x + 8 × 5.5 = 87.50

6x + 44 = 87.5

6x = 87.5 - 44 = 43.5

x = 43.5/6 = 7.25