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3 years ago

Which of the following best describes the solution to the equation below? 3(x+ 7) = 3x + 21

Mathematics

1 answer:

Alexus [3.1K]3 years ago

3 0

Answer:

x = x; the solution has infinite solutions

Step-by-step explanation:

3(x+ 7) = 3x + 21; distribute the 3 on the left side

3x + 21 = 3x + 21; now subtract 21 from both sides

3x = 3x; divide by 3

x = x; the solution has infinite solutions. Since both terms are equal any value for x will be true on this equation.

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Find the radius of a sphere with a surface area of 1024π square inches

agasfer [191]

Answer:

Step-by-step explanation:

The formula of a Surface Area of a sphere:

$S.A.=4\pi R^2$

R - radius

We have

$S.A.=1024\pi\ in^2$

Substitute:

$4\pi R^2=1024\pi$ <em>divide both sides by π</em>

$4R^2=1024$ <em>divide both sides by 4</em>

$R^2=256\to R=\sqrt{256}\\\\R=16\ in$

4 0

3 years ago

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Alexus [3.1K]

Answer:

I'm pretty sure it is 21

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3 years ago

Which expression is the radical form of x^3/4

seraphim [82]

4th root of x cubed

7 0

3 years ago

Can someone help me answer this please

Citrus2011 [14]

Answer:

N = 3/8

Step-by-step explanation:

let the number be N

let's express the word sentence as a mathematical expression:

"a number multiplied by 2/5"

= "N" multiplied by 2/5

= N x (2/5)

= (2N/5) ------- (1)

"a number multiplied by 2/5 is 3/20" can be written as:

(2N/5) = 3/20 (multiplying both sides by 5)

2N = (3/20) x 5

2N = 3/4 (divide both sides by 2)

N = (3/4) ÷ 2

N = (3/4) x (1/2)

N = 3/8

6 0

3 years ago

Simplify each expression. Use positive exponents. <br> A^4b^-3<br> ab^-2

choli [55]

$\dfrac{a^4b^{-3}}{ab^{-2}}$

$= {a^{4-1}b^{-3+2}}$

$= {a^{3}b^{-1}}$

$= \dfrac{a^3}{b}$

6 0

3 years ago

Read 2 more answers

Which of the following best describes the solution to the equation below? 3(x+ 7) = 3x + 21​

Which of the following best describes the solution to the equation below? 3(x+ 7) = 3x + 21