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2 years ago

Solve for the unknown check your solution by substituting it in the original equation. -X+11=-2X-7

Mathematics

1 answer:

Debora [2.8K]2 years ago

8 0

Answer:

Step-by-step explanation:

-X+11=-2X-7

11=3X-7

18=3X

18/3= 6

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Please select the best answer from the choices provided

Ira Lisetskai [31]

<u>Answer:</u>

The correct answer option is c. $\frac{1}{9a^2}$ .

<u>Step-by-step explanation:</u>

We are given an expression $(27a^{-3})^{-\frac{2}{3} }$ and we are supposed to simplify it.

We can also write $(27a^{-3})^{-\frac{2}{3} }$ as $(\frac{3^3}{a^3} )^{-\frac{2}{3} }$ .

We know the power rule (a^m)^n=a^{mn} which means that to raise a power to a power you need to multiply the exponents.

So multiplying the exponents to get:

$\frac{3^{(3.-\frac{2}{3})} }{a^{(3.\frac{2}{3})} }\\\\\frac{3^{-2}}{a^2}\\ \\\frac{1}{3^2a^2} \\\\\frac{1}{9a^2}$

Therefore, the correct answer option is c. $\frac{1}{9a^2}$ .

4 0

3 years ago

Which graph shows a line with an x-intercept of -5?

Finger [1]

Answer:

The answer is A.

Step-by-step explanation:

The only option is A. since an intercept of (-5,0)

Option B has y-int: (0,-5)
Option C has y-int: (0,5)

Option D has x-int(5,0)

8 0

2 years ago

14.2 is 35.5% of what number W

bonufazy [111]

14.2/x=100/35.5
5.041=x
Final
35.5% of 14.2=5.041

3 0

3 years ago

Which expression is equivalent to (7x+9y)2

Arada [10]

Answer:

$49x^2+126xy+81y^2$

Step-by-step explanation:

Use the square of a binomial theorem

$(a+b)^2$ = $a^2+2ab+b^2$

Now expand the given equation:

$(7x+9y)^2=49x^2+126xy+81y^2$

Hope this helps :)

Have a great day!

6 0

2 years ago

Solve for the variable: x + 9 > -4

Marina CMI [18]

$Hi \\ \\ x+9\ \textgreater \ -4 \\ \\ x\ \textgreater \ -4-9 \\ \\ \boxed{x\ \textgreater \ -13} \\ \\ S=\{x\in~\mathbb{R} |x\ \textgreater \ -13\} \\ \\ \\$

3 0

3 years ago

Read 2 more answers

Solve for the unknown check your solution by substituting it in the original equation. -X+11=-2X-7​

Solve for the unknown check your solution by substituting it in the original equation. -X+11=-2X-7