Please help me ~ Ocean

ANSWER

The correct answer is C

EXPLANATION

The given inequality is:

[tex]2x - 8 \: < \: 7[/tex]

Group the constant terms on the right hand side to get;

[tex]2x \: < \: 7 + 8[/tex]

Simplify the right hand side

[tex]2x \: < \: 15[/tex]

Divide both sides by 2

[tex]x \: < \: \frac{15}{2} [/tex]

{x|x<15/2}

The correct answer is C

Answer:

[tex]\large\boxed{\left\{x\ |\ x<\dfrac{15}{2}\right\}}[/tex]

Step-by-step explanation:

[tex]2x-8<7\qquad\text{add 8 to both sides}\\\\2x-8+8<7+8\\\\2x<15\qquad\text{divide both sides by 2}\\\\\dfrac{2x}{2}<\dfrac{15}{2}\\\\x<\dfrac{15}{2}[/tex]

Answer:

The cosine function that models this reaction is:

[tex]y=-70cos(\frac{1}{4}\pi x) +90[/tex]

Step-by-step explanation:

The general cosine function has the following form

[tex]y = Acos(bx) + k[/tex]

Where A is the amplitude: half the vertical distance between the highest peak and the lowest peak of the wave.

[tex]\frac{2\pi}{b}[/tex] is the period: time it takes the wave to complete a cycle.

k is the vertical displacement.

The maximum temperature is 160 and the minimum is 20. Then the amplitude A is:

[tex]A =\frac{160-20}{2}\\\\A= 70[/tex]

The reaction completes a cycle in 8 hours

Then the period is 8 hours.

Thus:

[tex]\frac{2\pi}{b}=8\\\\ b=\frac{2\pi}{8}\\\\ b=\frac{1}{4}\pi[/tex]

The function is:

[tex]y = 70cos(\frac{1}{4}\pi x)+k[/tex]

when [tex]t=0[/tex] y is minumum therefore [tex]y=-cos(x)[/tex]

So

[tex]y = -70cos(\frac{1}{4}\pi x)+k[/tex]

Now we substitute [tex]t = 0[/tex] in the function and solve for k

[tex]20 = -70cos(0)+k\\\\k=20+70\\\\k=90[/tex]

Finally

[tex]y=-70cos(\frac{1}{4}\pi x) +90[/tex]

Answer:

[tex]\large\boxed{_7P_2=42}[/tex]

Step-by-step explanation:

[tex]_nP_k=\dfrac{n!}{(n-k)!};\ n!=1\cdot2\cdot3\cdot...\cdot n\\\\\text{We have:}\\\\_7P_2=\dfrac{7!}{(7-2)!}=\dfrac{7!}{5!}=\dfrac{5!\cdot6\cdot7}{5!}=6\cdot7=42[/tex]

The permutation 7P2 calculates the number of ways to arrange 2 items from a set of 7. It is found using the formula nPr = n! / (n-r)!, resulting in 42 different arrangements.

The student is asking about how to calculate a permutation, specifically 7P2. Permutations are used to determine the number of ways to arrange a subset of items from a larger set, where the order does matter. To compute 7P2, we use the formula for permutations, which is nPr = n! / (n-r)!, where n is the total number of items to choose from, and r is the number of items to arrange.

To evaluate 7P2, we plug in 7 for n and 2 for r, which gives us: 7P2 = 7! / (7-2)! 7P2 = 7! / 5! 7P2 = (7 x 6 x 5!) / 5! 7P2 = 7 x 6 7P2 = 42

Therefore, there are 42 different ways to arrange 2 items from a set of 7.

STEP 1: Convert interest rate of 2% per 6 months into rate per year.

rate per year = rate per 6 month⋅2=2%⋅2=4%

STEP 2: Convert 9 months into years.

 9 months =

9

12

 years=0.75 years

STEP 3: Find principal by using the formula

I=P⋅i⋅t

, where I is interest, P is total principal, i is rate of interest per year, and t is total time in years.

In this example I = $15, i = 4% and t = 0.75 years, so

I

P

P

P

=P⋅i⋅t

=

I

i⋅t

=

15

0.04⋅0.75

=500

Final answer:

To calculate the amount at 6% simple interest on Rs 1200 for 9 months, apply the simple interest formula. Convert time to years, calculate the interest, then add it to the principal to find the total amount due, which is Rs 1254.

Explanation:

To find the amount at 6% simple interest on Rs 1200 due in 9 months, you can use the simple interest formula:

Simple Interest =  Principal × Rate × Time

We have the Principal (P) as Rs 1200, the Rate (R) as 6% per annum (or 0.06 when expressed as a decimal), and the Time (T) as 9 months. The rate is given per annum but we have in months so, we need to convert the time to years. There are 12 months in a year, so 9 months is ⅓ or 0.75 years.

Now, let's calculate the simple interest (SI):

SI = 1200 × 0.06 × 0.75 = Rs 54

Total Amount = Principal + Simple Interest

Total Amount = 1200 + 54 = Rs 1254

Therefore, the total amount due at the end of 9 months would be Rs 1254.

Answer: First option.

Step-by-step explanation:

 To simplify the polynomial [tex]2x^2y + 8x^3 - xy^2 - 2x^3 + 3xy^2 + 6y^3[/tex] you need to add the like terms, then you get:

[tex]=2x^2y+6x^3+2xy^2+6y^3[/tex]

Now, you know that Raj put this polynomial in standard form with the last term being 6y³, this means that he ordered it in descending order of "x" power and in ascending order of "y" power:

[tex]=6x^3+2x^2y+2xy^2+6y^3[/tex]

You can observe that the first term of the polynomial  that Raj ended up with, is:

[tex]6x^3[/tex]

Answer:

The answer would b A

Convert the tax rate from a percent to a decimal number by moving the decimal point 2 places to the left.

8.8% = 0.088

Now multiply the price of the item by the tax rate:

63 x 0.088 = 5.544

Now round that to the nearest cent = $5.54

Answer:

$5.54

Step-by-step explanation:

The sum of the measures of the interior angles of a triangle is 180˚. Example 3: In NMQ. ∆.

For this case, we have given an ABC triangle with internal angles α,β,γ. By definition, the sum of the internal angles must be 180 degrees.

That is to say:

α+β+γ=180

This can be demonstrated according to the fifth postulate of Euclid. From there we have to draw a parallel to one of the sides, by the vertex opposite him, the interior angles of the left side add two right angles.

Answer:

180 degrees

This may be what you're looking for:

Answer:

7x2-1 = 0

Step-by-step explanation:

Add  1  to both sides of the equation :

                     7x2 = 1

Divide both sides of the equation by 7:

                    x2 = 1/7 = 0.143

When two things are equal, their square roots are equal. Taking the square root of the two sides of the equation we get:  

                     x  =  ± √ 1/7  

Answer:

Step-by-step explanation:

Rewrite 7x^2 + 1 = 0 as 7x^2 = - 1, and then as x^2 = -1/7.

Taking the square root of both sides, and remembering that the square root of a negative number is imaginary, we get:

                        i√7

x = ±i(1/7) = ± ----------

                          7

Answer:

is the fourth one

Step-by-step explanation:

just replace x with the numbers given

and then work it out.

y=x-5

y=1-5=-4

y=2-5=-3

and so on

hope this helps

For this case we have a function of the form [tex]y = f (x)[/tex]where:

[tex]f (x) = x-5[/tex]

We must find the values of "y" when [tex]x = 1,2,3,4[/tex]

Then, keeping in mind that different signs are subtracted and the sign of the major is placed:

Answer:

Option D

The side length of the triangle are as follows:

a = 11.71 and b = 15.56

The side of a triangle can be found using sine rule or cosine rule depending on the sides and angles given in a triangle.

Therefore, the sides a and b can be found in the triangle using sine rule as follows:

a / sin A = b / sin B = c / sin C

b / sin 110 = 7 / sin 25°

cross multiply

b sin 25 = 7 sin 110°

b = 7 sin 110° / sin 25

b = 6.5778483455 / 0.42261826174

b = 15.5625174507

b = 15.56 units

Let's find a as follows:

a / sin 45 = 7 / sin 25

a sin 25 = 7 sin 45

a = 7 sin 45 / sin 25

a = 4.94974746831 / 0.42261826174

a = 11.7108376716

a = 11.71 units

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Answer:

a. equivalent

b. not equivalent

c. equivalent

d. equivalent

Step-by-step explanation:

a. 3x +7x = (3+7)x = 10x . . . equivalent to 10x

__

b. 5x -10x = (5 -10)x = -5x . . . not equivalent to 5x

__

c. 4(1 +2x) -3x = 4·1 +4·2x -3x = 4 +(8 -3)x = 4 +5x = 5x +4 . . . equivalent to 5x +4

__

d. 5 -3(2 -4x) = 5 -3·2 -3(-4x) = 5 -6 +12x = -1 +12x . . . equivalent to -1 +12x

What you did in the graph was correct. Essentially, all you have to do to achieve a negative slope is either make the rise negative or the run negative (make sure not to do both, as the negatives would cancel out and make a normal line)

Answer:

12

Step-by-step explanation:

1/3 (12) +8

4+8= 12

Answer:

12

Step-by-step explanation:

we can use PEMDAS to find the solution to the expression, PEMDAS stands for:

Parentheses

Exponents

Multiplication

Division

Addition

Subtraction

we look at the expression and we see parentheses, so we solve whats inside of the parentheses

(4 x 3) = 12

1/3 (12) + 2³

now, we solve for the exponents in the expression

2³ = 2 x 2 x 2 = 8

1/3 (12) + 8

now we multiply the terms in the expression that need to be multiplied.

1/3 x 12 = 4

4 + 8

we have no division in the expression, so we skip that step and move onto addition, which will be our last step as there is no subtraction in the expression either

4 + 8 = 12

our answer to the expression is 12

Answer:

[tex]x^{15}.y^{9}[/tex]

Step-by-step explanation:

[tex]\frac{x^{19} . y^{21}}{(x^2. y^6)^2} \\\\Here\,\, exponent\,\, rules\,\, will\,\, be\,\, used.\\First\,\, multiply\,\, power\,\, of \,\,2\,\, with\,\, denominator \,\,exponents\\\\\frac{x^{19} . y^{21}}{x^4. y^{12}}\\If \,\, same\,\, bases\,\, are\,\, divided\,\, then\,\, their\,\, exponents\,\, are \,\,subtracted\,\,\\\\x^{19-4}.y^{21-12}\\\\x^{15}.y^{9}[/tex]

The answer is:

It will took 0.375 hours for Ava and Kelly to be 3/4 miles apart.

To calculate how long after they start they will be 3/4 miles apart, we need to write two equations.

So, writing the equations, we have:

Calculations for Ava:

We have the following information,

[tex]v_{Ava}=6mph[/tex]

Then, writing the equation,

[tex]x_{Ava}=x_{o}+v_{Ava}*t[/tex]

[tex]x_{Ava}=x_{o}+v_{6mph}*t[/tex]

Calculations for Kelly:

We have the following information,

[tex]v_{Kelly}=8mph[/tex]

We need to calculate when Kelly will be 3/4 miles apart of Ava, so, it's position will be the Ava's position plus 3/4 miles.

Then, writing the equation,

[tex]x_{Ava}+0.75miles=x_{o}+v_{Kelly}*t[/tex]

[tex]x_{Ava}+0.75miles=x_{o}+v_{8mph}*t[/tex]

Now, substituting Ava's speed into the second equation, we have:

[tex]x_{o}+6mph*t+0.75miles=x_{o}+8mph*t[/tex]

[tex]6mph*t+0.75miles=+8mph*t[/tex]

[tex]8mph*t-6mph*t=0.75miles[/tex]

[tex]2mph*t=0.75miles[/tex]

[tex]t=\frac{0.75miles}{2mph}=0.375hours[/tex]

Hence, we have that it will took 0.375 hours for Ava and Kelly to be 3/4 miles apart.

Have a nice day!

Answer:

So what the other guy said in minutes was 22.5 minutes

Step-by-step explanation:

Answer:

The maximum of y = sin x is 1. The amplitude of a sinusoidal function is one-half of the positive difference between the maximum and minimum values of a function.

Step-by-step explanation:

Answer:

0

Step-by-step explanation:

Answer:

[tex]\large\boxed{\dfrac{1}{x^2}+x^2=23}[/tex]

Step-by-step explanation:

[tex]\left(\dfrac{1}{x}+x\right)^2=25\qquad\text{use}\ (a+b)^2=a^2+2ab+b^2\\\\\left(\dfrac{1}{x}\right)^2+2(x\!\!\!\!\diagup)\left(\dfrac{1}{x\!\!\!\!\diagup}\right)+x^2=25\\\\\dfrac{1}{x^2}+2+x^2=25\qquad\text{subtract 2 from both sides}\\\\\dfrac{1}{x^2}+x^2=23[/tex]

The value of [tex]\frac{1}{x^{2} } +x^{2}[/tex] is equal to 23 by using the algebraic identity which has the relationship between [tex](\frac{1}{x } +x)^2[/tex] and [tex]\frac{1}{x^{2} } +x^{2}[/tex]  is [tex](a+b)^2 = a^2 +b^2 +2ab[/tex].

Given that if [tex](\frac{1}{x } +x)^2[/tex] = 25 then find the value of [tex]\frac{1}{x^{2} } +x^{2}[/tex] .

To find the  value of [tex]\frac{1}{x^{2} } +x^{2}[/tex] by using the algebraic identity and follow the steps:

Apply the algebraic identity to the given equation, that is :

 [tex](a+b)^2 = a^2 +b^2 +2ab[/tex]

Given that :

[tex](\frac{1}{x } +x)^2=25[/tex]

Expand the LHS by using mentioned algebraic identity:

[tex]\frac{1}{x^2 } +x^2+2x\times\frac{1}{x} =25[/tex]

On cancelation of the variable x in third term of the LHS gives:

[tex]\frac{1}{x^2 } +x^2+2=25[/tex]

Subtract by 2 on both sides, gives:

[tex]\frac{1}{x^2 } +x^2=23[/tex]

Therefore, the value of [tex]\frac{1}{x^{2} } +x^{2}[/tex] is equal to 23 by using the algebraic identity which has the relationship between [tex](\frac{1}{x } +x)^2[/tex] and [tex]\frac{1}{x^{2} } +x^{2}[/tex]  is

[tex](a+b)^2 = a^2 +b^2 +2ab[/tex]

Learn more about algebraic identity   here:

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‘an’ could represent any number

Simplify the expression to get an = an + 0, or an = an.

This means that a number is equal to itself, which is true for all numbers.

Answer:

24

Step-by-step explanation:

4x6 = 24

-2 and 2 are 4 apart

2 and -4 are 6 apart

Answer:

24 square units

Step-by-step explanation:

Answer: B.

Length x width x height

Whenever you're finding the volume of a quadrilateral, you multiply the base x width x height of the shape. In this case, you have all three of those elements.

First I substituted those numbers into their spots in the expression (it doesn't matter which you multiply first, since multiplying is commutative).

8 x 12 x 5 = 480

Your answer is 480 square inches.

The answer is -9

Answer:

The missing value is -9

Step-by-step explanation:

-9+6 is -3.

The approximate probability that both you and your friend will choose chocolate ice cream from seven different flavors is 1/49, or approximately 0.020408.

We are looking to find the probability that both you and your friend choose chocolate ice cream from a selection of 7 different flavors. Since the choice of ice cream is independent for each person, we can calculate the probability of both events occurring by multiplying the probability of each event occurring individually.

The probability that one person chooses chocolate ice cream is 1 out of 7, or approximately 0.142857. To find the probability that both you and your friend choose chocolate ice cream, we multiply the individual probabilities:

Probability of you choosing chocolate: 1/7

Probability of your friend choosing chocolate: 1/7

Combined probability: 1/7 x 1/7 = 1/49

Therefore, the approximate probability that both you and your friend choose chocolate ice cream is 1/49, or approximately 0.020408.

The vertices of a triangle are also called the points. Every triangle has 3 vertices. In this case, they are given.

A(-4,4)

B(-4,8)

C(0,4)

I graphed these points for you :)

Answer:

Step-by-step explanation:

Step 1: Additive inverse

Step 2: Additive identity

Step 3: Addition property of equality

22 is D

Answer:

The answer would be B $6.99.  With this problem you would need to divide the total cost by 8 to get the price for a single steak.  

Step-by-step explanation:

Answer:

Frequency is the number of times that roll occurred.

Ex: 7 occurred 5 times...... 5 goes in the frequency column.

Answer:

The height of the cone is 97 in

Step-by-step explanation:

Equate the formulas for the volume of a cylinder and that of a cone:

Vol-Cyl              Vol-Cone

πr²h         =        (1/3)πr²h

Now cancel out items that are the same on both sides (π):

r²h             =         (1/3)r²h

Now substitute the given values for both solids:

(12 in)²(8 in)  =  (1/3)(6 in)²(h-cone)

                                 1152 in³

Then (h-cone) = --------------------  =  97 in

                                   12 in²

The height of the cone is 97 in

Answer:

96 in

Step-by-step explanation:

Answer:

x² - 22x + y² + 20y = 4

x² - 22x + 121 + y² + 20y + 100 = 225

(x - 11)² + (y + 10)² = 15²

Center: (11, -10)

Radius: 15

Answer:

Yes

Step-by-step explanation:

Yes because all three sides have the same ratio