2 years ago

the length of a rectangle is represented by 3x-7 and the width by x+4. express the perimeter as a polynomial in simplest form

Mathematics

1 answer:

ahrayia [7]2 years ago

8 0

Answer: 8x - 6

Step-by-step explanation:

Perimeter is found by doing 2l + 2w

The length is 3x - 7 and width is x + 4

2(3x - 7) + 2(x + 4) =

6x - 14 + 2x + 8 =

8x - 6

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The speed of sound in air is 340 m/s. How far , in meters, would a sound of wave travel on 7 seconds?

Rasek [7]

Answer:

2 380m

Step-by-step explanation:

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2 years ago

Point P on the number line shows Lara's score after the first round of a quiz: A number line is shown from negative 8 to 0 to po

Luda [366]

Answer:

The correct group of answer is D) 3 + (−4) = −1, because −1 is 4 units to the left of 3

Step-by-step explanation:

Consider the provided information.

Point P on the number line shows Lara's score after the first round of a quiz:

Point P is shown on 3.

That means after the first round her total was 3.

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3 0

3 years ago

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Jessie kristen and kendell all went shopping together and bought shirts. Kristen bought a shirt that cost $8.50. Jessie shirt co

Olin [163]

Answer:

Kendall's shirt cost 18.20

Step-by-step explanation:

12.75+8.50=21.25

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3 years ago

Use synthetic substitution to evaluate the polynomial P(x) = x^3-3x^2+4x-7 for x=3

Zina [86]

Answer:

$\frac{x^3-3x^2+4x-7}{x-3} =(x^2+4)+\frac{5}{x-3}$

Step-by-step explanation:

We are given polynomial as

$P(x)=x^3-3x^2+4x-7$

and it is divided by x=3 or x-3

we can use synthetic division

so, we got

Remainder =5

Quotient is

$=x^2+0x+4$

$=x^2+4$

we can write as

$\frac{x^3-3x^2+4x-7}{x-3} =(x^2+4)+\frac{5}{x-3}$

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3 years ago

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Reika [66]

15 you have to do all the steps thank it this I think

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3 years ago