Li’s garden is shaped like a rectangle. The area of the garden is 232 meters. If the length is 8 meters, what is the perimeter?
16 m
29 m
58 m
74 m

Answer:

The correct answer is A. x = 2 +/- √42

Step-by-step explanation:

Let's solve for x the quadratic equation, this way:

x² - 4x - 9 = 29

x² - 4x - 38 = 0

Using the quadratic formula, we have:

x = [- (-4) +/- √ -4² - 4 * -38]/2

x = 4 +/- √ 16 + 152/2

x = 4 +/- √ 168/2

x = 4 +/- √ 4 * 42/2

x = 4 +/- 2 √42/2

x = 2 +/- √42

The correct answer is A. x = 2 +/- √42

Answer:

the answer is A on edg2020

Step-by-step explanation:

Let x = distance traveled (not round trip)

x/10 + x/3 = 6.5

13/30x = 6.5

x = 15 miles

answer: 15 miles

Answer:

15 miles

Step-by-step explanation:

Find out the  how far into the country does he go.  

To proof

Let us assume that the total diatance travelled into the country be x .

Formula

As given

A cyclist rides into the country at an average speed of 10 miles per hour. When his bicycle gets a flat tire,

he walks it back at an average speed of 3 miles per hour.

If he returns home 6 and a half hours after he starts i.e the total time including the bike time and walk time of the cyclist be 6.5 hours.

Than the equation becomes

L.C.M of (10,3) = 30

Than the equation becomes

3x +10x = 195

solving

13x = 195

x = 15 miles into the country

Hence proved

Answer: time = 3.15 hrs

Step-by-step explanation:

distance = 63km

speed = 20km/hr

time = ?

speed = distance / time

therefore :

time = distance / speed

time = 63/20

time = 3.15 hours

Answer: 3 for whole numbers, but if you want to be exact, 3 and 3/20 (three and three twentieths)

Step-by-step explanation:

20 times 3 is 60, and there is 3 left so you would make it a fraction since it won't divide into 20.

The larger number is 97 and smaller number is 22.

Step-by-step explanation:

Let,

The two numbers are x and y.

According to given statement;

x+y=119      Eqn 1

y-4x=9       Eqn 2

Subtracting Eqn 2 from Eqn 1

[tex](x+y)-(y-4x)=119-9\\x+y-y+4x=110\\5x=110[/tex]

Dividing both sides by 5

[tex]\frac{5x}{5}=\frac{110}{5}\\x=22[/tex]

Putting x=22 in Eqn 1

[tex]22+y=119\\y=119-22\\y=97[/tex]

The larger number is 97 and smaller number is 22.

Keywords: linear equation, elimination method

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The value of function f (x) at x = 3 is,

⇒ f (3) = - 22

A relation between a set of inputs having one output each is called a function. and an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).

Given that;

The function is,

⇒ f (x) = - 2x² - 4

Now, Put x = 3 in above function we get;

⇒ f (x) = - 2x² - 4

Put x = 3;

⇒ f (3) = - 2 (3)² - 4

⇒ f (3) = - 2 x 9 - 4

⇒ f (3) = - 18 - 4

⇒ f (3) = - 22

Thus, The value of function f (x) at x = 3 is,

⇒ f (3) = - 22

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Answer:

720°

Step-by-step explanation:

The sum of the interior angles of a polygon is

sum = 180° (n - 2) ← n is the number of sides

Here n = 6 ( number of sides of a hexagon ), thus

sum = 180° × 4 = 720°

The sum of the measures of the interior angles of a hexagon is [tex]720^{\circ}[/tex]

A polygon is a plane figure that is described by a finite number of straight line segments connected to form a closed polygonal chain. The bounded plane region, the bounding circuit, or the two together, may be called a polygon. A hexagon is a six-sided polygon or [tex]6-[/tex]gon. Interior angles are those that lie inside a polygon.

The total of the internal angles of any simple hexagon is [tex]\boldsymbol{720^{\circ}}[/tex]

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Answer:

4x - 8 = -(8 - 4x)

Step-by-step explanation:

Answer: -32

First you would have to multiply 4x8 which is 32 and then just add the dash before the 32.

Answer:

Step-by-step explanation:

(14)

Given :

y = [tex]\frac{1}{2}[/tex][tex](x-3)^{2}[/tex] - 6

comparing with the standard form :

y = a[tex](x-h)^{2}[/tex] + k

vertex = ( h , k )

Focus = (h , k+14a )

Directrix = y = k

comparing the equation and the standard form ;

Vertex = ( 3 , -6 )

Focus = ( 3 , -6+14{1/2} )

Focus = ( 3 , 1)

Directrix ⇒ y = -6

(19)

[tex]x^{2}[/tex] + [tex]4y^{2}[/tex] = 13 .............. equation 1

[tex]x^{2}[/tex] - [tex]4y^{2}[/tex] = 5  ..................... equation 2

add equation 1 and 2

2[tex]x^{2}[/tex] = 18

divide through by 2

[tex]x^{2}[/tex] = 9

x = ±3

substitute x = 3 into equation 1

[tex]3^{2}[/tex] + 4[tex]y^{2}[/tex] = 13

9 +4[tex]y^{2}[/tex] = 13

4[tex]y^{2}[/tex] = 13 - 9

4[tex]y^{2}[/tex] = 4

[tex]y^{2}[/tex] = 1

y = ±1

Therefore , the solution is ( 3 , 1 ) or (-3 , -1 )

Answer:

  14) vertex: (3, -6); focus: (3, -5.5); directrix: y = -6.5

  17) see below for a graph

  19) (±3, ±1) — four points

  20) see below for the work

Step-by-step explanation:

14) The vertex form of a quadratic equation can be written as ...

  [tex]y=\dfrac{1}{4p}(x-h)^2+k[/tex]

This parabola will have its vertex at (h, k), its focus at (h, k+p), and its directrix at y=k-p.

The given equation is ...

  y = 1/2(x -3)² -6

Comparing this to the form above, we see that ...

  4p = 2, h = 3, k = -6

From this, we can find the value of p to be ...

  p = 2/4 = 1/2 . . . . divide the above equation by 4

Now, we know the parameters of the parabola are ...

_____

17) The equation of the parabola is given as ...

  y = 1/4(x -1)² +5

Comparing the given equation to the form shown in the above problem, we see that ...

So the parameters of the parabola are ...

The graph is shown below.

_____

20) It is convenient to show the solution steps before showing the solution. Hence we show problem 20 (steps) before problem 19 (solution).

The given system of equations is ...

The two equations can be added to give ...

  (x² +4y²) +(x² -4y²) = (13) +(5)

  2x² = 18 . . . . . . eliminate parentheses, collect terms

  x² = 9 . . . . . . . . divide by 2

  x = ±3 . . . . . . . . take the square root

__

The second equation can be subtracted from the first to give ...

  (x² +4y²) -(x² -4y²) = (13) -(5)

  8y² = 8 . . . . . . . eliminate parentheses, collect terms

  y² = 1 . . . . . . . . . divide by 8

  y = ±1 . . . . . . . . . take the square root

_____

19) Based on the above, the four solutions to the given system of equations are ...

  (3, 1), (3, -1), (-3, 1), (-3, -1)

__

A graph is shown in the second attachment.

Answer:

Step-by-step explanation:

The LCM of 5,4,3 is 5×4×3=60

Answer:

Step-by-step explanation:

[tex]m+3m+6=4m-9+15\qquad\text{combine like terms}\\\\(m+3m)+6=4m+(-9+15)\\\\4m+6=4m+6\qquad\text{subtract}\ 4m\ \text{from both sides}\\\\4m-4m+6=4m-4m+6\\\\6=6\qquad\bold{TRUE}\\\\\bold{CONCLUSION:}\ \text{infinitely many solutions}[/tex]

Answer:

The number of viruses was 2 times greater than bacteria.

Step-by-step explanation:

The number of viruses was [tex]2*10^9[/tex], and the number of bacteria was [tex]1*10^9[/tex].

To find how many times was the virus number greater than the bacteria number, we just divide the virus number by bacteria number:

[tex]\frac{ virus\:number }{bacteria\:number} =\frac{2*10^9 }{1*10^9} = 2*\frac{10^9}{10^9} =2[/tex]

Viruses are 2 times greater.

Answer:

Viruses are 2 times of the bacteria.

Step-by-step explanation:

Given:

Number of viruses = [tex]2\times 10^9[/tex]

Number of bacteria = [tex]1\times 10^9[/tex]

We have to found how many times viruses are greater than the bacteria.

To find how many times,we can divide both the numbers to compare its values.

Lets

Numerator = Number of viruses

Denominator = Number of bacteria

Dividing both we have,

⇒ [tex]\frac{2\times 10^9}{1\times 10^9}[/tex]

⇒ [tex]2\times 10^(^9^-^9)[/tex] ...[tex]\frac{ab^x}{cb^y}=\frac{ab^x^-^y}{c}[/tex]

⇒ [tex]2\times 10^0[/tex]       ...[tex]a^0=1[/tex]

⇒ [tex]2[/tex]

So the viruses are 2 times of the bacteria.

Answer:

(- 2, - 3 )

Step-by-step explanation:

Given the endpoints of a segment (x₁, y₁ ) and (x₂, y₂ ) then the midpoint is

[0.5(x₁ + x₂), 0.5(y₁ + y₂ ) ]

Here (x₁, y₁ ) = (2, 3) and (x₂, y₂ ) = (x, y) and the midpoint = (0, 0), thus

0.5(2 + x) = 0 , that is

2 + x = 0 ( subtract 2 from both sides )

x = - 2

0.5(3 + y) = 0, that is

3 + y = 0 ( subtract 3 from both sides )

y = - 3

Thus (x, y) = (- 2, - 3 )

Sally gave 30 shells to Jason

Solution:

Given that, Sally found 58 seashells on the beach, she gave Jason some of her seashells

She has 28 left

To find: Number of sea shells she gave to Jason

From given,

Total number of shells she found = 58

Remaining shells = 28

Therefore,

Number of sea shells she gave to Jason = Total number of shells she found - Remaining shells

Number of sea shells she gave to Jason = 58 - 28 = 30

Thus Sally gave 30 shells to Jason

Answer:

I believe that it would just be 20% of the $45 which would mean that you would have to pay $36 a month.

Hope this is helpful!

The cost to you per month, after the landlord's contribution, is $36.

If you buy both Liability and Contents insurance, and take advantage of the landlord's offer to pay 20% of the cost, the cost to you per month can be calculated as follows:

Let's assume the cost of Liability insurance is represented by 'L' and the cost of Contents insurance is represented by 'C'.

According to the information given, if you buy both insurances at the same time, the cost is $45 per month.

This means: L + C = $45

The landlord is willing to pay 20% of the cost, which is equal to 20% of ($45). To calculate this amount:

20% of $45 = (20/100) x $45 = $9

So, the landlord will pay $9 towards the cost of both insurances.

Now, if you subtract the landlord's contribution from the total cost, you'll get the amount you have to pay:

(L + C) - $9 = $45 - $9 = $36

Therefore, the cost to you per month, after the landlord's contribution, is $36.

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Answer:

Step-by-step explanation:

|x-4|<13.

The above equation means, whatever the actual value of x is, the value of (x - 4) must be greater than - 13 and less than 13.

Hence, -13 < x - 4 < 13 or, -9 < x < 17. The value of x will be in between -9 and 17. The value of x can not be -9 or 17.

Answer:

Job B

Step-by-step explanation:

Job A:

Job A pays $28.59 per hour.

Lauren expects to work 2,000 hours during the year, so Lauren can expect to be paid

[tex]\$28.59\times 2,000=\$57,180[/tex]

Job B:

Job B pays $25.71 per hour.

Lauren expects to work 2,000 hours during the year, so Lauren can expect to be paid

[tex]\$25.71\times 2,000=\$51,420[/tex]

Health insurance costs $6,650. Add health insurance to job B payment:

[tex]\$51,420+\$6,650=\$58,070[/tex]

Since [tex]\$58,070>\$57,180,[/tex] Lauren should take job B

There are 2100 cups in the package.

Step-by-step explanation:

Given,

Number of green cups in package = 630

This represent 30% of the total package.

Let,

x represent the total number of cups in package.

30% of x = 630

[tex]\frac{30}{100}*x=630\\0.30x=630[/tex]

Dividing both sides by 0.30

[tex]\frac{0.30x}{0.30}=\frac{630}{0.30}\\x=2100[/tex]

There are 2100 cups in the package.

Keywords: percentage, division

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Answer:

domain: {0, 5, 9, 32} range: {2,3,4,7}

Step-by-step explanation:

we know that

For a set of ordered pairs, the first elements of each ordered pair represents the domain of the function and second elements of each ordered pair represents the range of the function.  

The domain of a function is the set of all possible values of x

The range of a function is the complete set of all possible resulting values of y, after we have substituted the domain.

In this problem we have

values of x ----> [tex]\{0,5,9,32\}[/tex]

values of y ----> [tex]\{2,3,4,7\}[/tex]

therefore

domain: {0, 5, 9, 32} range: {2,3,4,7}

Answer:

0.45 45%

Step-by-step explanation:

Answer:

54.

Step-by-step explanation:

Start at 60 and subtract 6. That leaves you with 54.

The 60th term in the arithmetic sequence -6, -3, 0, 3, ... can be determined using the formula of an arithmetic sequence, which results in a value of 171.

An arithmetic sequence, also known as an , is a sequence of numbers in which each term is obtained by adding a fixed constant to the previous term. In simpler terms, it's a sequence where the difference between any two consecutive terms is always the same.

The given sequence is an arithmetic progression where each term differs from the previous term by a constant value. In this case, the common difference[tex](\(d\))[/tex]between consecutive terms is 3.

To find the 60th term of this sequence, we can use the formula for the nth term of an arithmetic sequence:

[tex]\[a_n = a_1 + (n - 1) \cdot d\][/tex]

Here,[tex]\(a_n\)[/tex]represents the nth term, \(a_1\) is the first term, \(n\) is the term number we want to find, and \(d\) is the common difference.

In this sequence:

- The first term [tex](\(a_1\)) is -6.[/tex]

- The common difference [tex](\(d\)) is 3.[/tex]

- We want to find the 60th term, so [tex]\(n = 60\).\\[/tex]

Now, we can substitute these values into the formula:

[tex]\[a_{60} = -6 + (60 - 1) \cdot 3\][/tex]

[tex]\[a_{60} = -6 + 59 \cdot 3\][/tex]

[tex]\[a_{60} = -6 + 177\][/tex]

[tex]\[a_{60} = 171\][/tex]

Therefore, the 60th term in this arithmetic sequence is 171. This means that if you continued the sequence, the 60th term would be 171 units greater than the first term (-6), following the pattern of adding 3 at each step.

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Answer:

Yes it is 15

Step-by-step explanation:

30/2 =15

Answer:

Yes, you are right! The answer is 15!  :)

Step-by-step explanation:

2y = 30

Divide by two to get y on it's own.

y = 15

Final answer:

To find the final cost of an Apple iPod after a mail-in rebate and the cost of mailing the rebate (envelope and stamp), subtract the rebate amount from the original price and add the mailing costs. The total cost after these calculations is $726.82.

Explanation:

Let's tackle the Apple iPod rebate calculation problem. An Apple iPod sells for $781.29 and has a mail-in rebate for $55.00. To calculate the cost after the rebate, you must also consider the costs of an envelope and a stamp, which are $0.13 and $0.40, respectively. The formula for the final cost after applying the mail-in rebate, including the expenses for an envelope and a stamp, is as follows:

Calculate the rebate price by subtracting the rebate amount from the original price: $781.29 - $55.00 = $726.29.

Add the costs of the envelope and stamp to the price after rebate: $726.29 + $0.13 + $0.40 = $726.82.

The final cost of the iPod after the rebate and additional costs is $726.82.

Answer:

12

Step-by-step explanation:

4(2+1)

4*3

12

Answer:

substitute n in bigger equation with 2.

4(2+1)

4×3=12

Answer:

-10

Step-by-step explanation:

Answer:

-6

Step-by-step explanation:

1. Geometric Sequence

2. [tex]a_n = a_{n-1} * 3[/tex]

3. [tex]a_n = 6 * (3)^{n-1}[/tex]

Step-by-step explanation:

Given sequence is:

6, 18, 54, 162,....

Here

[tex]a_1 =6\\a_2 = 18\\a_3 = 54[/tex]

(a) Is this an arithmetic or geometric sequence?

We can see that the difference between the terms is not same so it cannot be an arithmetic sequence.

We have to check for common ratio (ratio between consecutive terms of a sequence) denoted by r

[tex]r = \frac{a_2}{a_1} = \frac{18}{6}= 3\\r = \frac{a_3}{a_2} = \frac{54}{18} = 3[/tex]

As the common ratio is same, the given sequence is a geometric sequence.

(b) How can you find the next number in the sequence?

Recursive formulas are used to find the next number in sequence using previous term

Recursive formula for a geometric sequence is given by:

[tex]a_n = a_{n-1} * r[/tex]

In case of given sequence,

[tex]a_n = a_{n-1} * 3[/tex]

So to find the 5th term

[tex]a_5 = a_4*3\\a_5 = 162*3\\a_5 = 486[/tex]

(c) Give the rule you would use to find the 20th week.

In order to find the pushups for 20th week, explicit formul for sequence will be used.

The general form of explicit formula is given by:

[tex]a_n = a_1 * r^{n-1}[/tex]

Putting the values of a_1 and r

[tex]a_n = 6 * (3)^{n-1}[/tex]

Hence,

1. Geometric Sequence

2. [tex]a_n = a_{n-1} * 3[/tex]

3. [tex]a_n = 6 * (3)^{n-1}[/tex]

Keywords: Geometric sequence, common ratio

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Answer:

The number is 50.

Step-by-step explanation:

0.6x=30

x=30/0.6

x=50