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2 years ago

15

Bonjour !

1 answer:

koban [17]2 years ago

5 0

Answer: x=3/4 x=-4

Step-by-step explanation:

(4x-3)(x+4)=0

4x-3=0

4x-3+3=0+3

4x=3

Divide both parts of the equation by 4:

$\displaystyle\\x=\frac{3}{4}$

x+4=0

x+4-4=0-4

x=-4

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A cube has a volume of 27 squared feet. What is the length of each side?

Step2247 [10]

Hello!

The formula for volume of a cube is $V= a^{3}$ ; you are given the volume, so plug it into the formula for $V$ .

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What is 288 divided by 30?

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3 years ago

What is D of the arithmetic sequence for which a5 equals 24 and a9 equals 40

Gnom [1K]

In an arithmetic sequence d represent the common difference.

The formula to find the general term of an arithmetic sequence is,

$a_{n} =a_{1} +(n-1)d$

Where $a_{n}$ = nth term and

$a_{1}$ = First term.

Given, $a_{5} = 24, a_{9} = 40$ . Therefore,

$a_{1} +(5-1)d = 24 , a_{1} +(9-1)d = 40$

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Next step is to subtract the above equations so that we can eliminate a1 and get the value of d. Hence,

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3 years ago

The area of a circle is 9π in². What is the circumference, in inches? Express your answer in terms of \piπ

dangina [55]

Answer:

$6\pi$ in

Step-by-step explanation:

The formula to find the area of a circle: $\pi r^{2}$ , where $r$ is the radius.

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1) To find the circumference of the circle, we need to find the radius ( $r$ ) first. Since the area of the circle is given to us, we need to equate this to the formula to find the area of a circle.

$9\pi =\pi r^2$

Cancel the $\pi$ by bringing it to the other side.

$9 =\pi r^2$ ÷ $\pi$

$9 = r^2\\\sqrt{9} = r\\3 = r$

2) Find the circumference of the circle by using the formula, $2\pi r$ .

= $2*\pi *3$

= $6\pi$ in

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3 years ago