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4 years ago

Need help with number 8

Mathematics

1 answer:

natka813 [3]4 years ago

8 0

Perimeter is 2(2x+5)+2(x-2) which is 4x+10+2x-4 which is in turn 6x+6. 6x+6 is the perimeter. Hope I helped!

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What’s the answer to this question below. A b c or d

maks197457 [2]

Answer:

$a=0$

Step-by-step explanation:

The given expression is;

$(\frac{1}{7})^{3a+3} =343^{a-1}$

This implies that;

$7^{-1(3a+3)} =7^{3(a-1)}$

Equate the exponents;

$-1(3a+3) =3(a-1)$

Expand;

$-3a-3 =3a-3$

$-3a-3a =-3+3$

$-6a=0$

$a=0$

7 0

3 years ago

Read 2 more answers

Given CDEFG ≌ HIJKL and CD = 12, DE = 13, EF = 10, FG = 11, and GC = 8, what is HI?

Licemer1 [7]

CDEFG $\cong HIJKL \Rightarrow\overline{HI}=\overline{CD}$
$\\\Downarrow\\ \overline{HI}=12$

5 0

3 years ago

Rewrite the following without an exponent<br> (-7)⁻²

chubhunter [2.5K]

Answer:

The correct answer is 1/49

Step-by-step explanation:

In order to find this, we first can eliminate the negative in the exponent by putting the whole this in the denominator.

(-7)^-2 = 1/(-7)^2

Now we can evaluate the denominator

1/(-7)^2 = 1/49

7 0

4 years ago

True or false? 18quiv36(mod)6

spayn [35]

Their is no answer to what you are truly asking False

5 0

3 years ago

X and y simplifying problem. Please explain how to do thiese. I will gove 15 points

Strike441 [17]

$\dfrac 56 x + \dfrac25 y - \dfrac14 x + \dfrac3{10} y$

First, combine like terms:

$\left(\dfrac 56 - \dfrac14\right) x + \left(\dfrac25 + \dfrac3{10}\right)y$

Now just simplify the coefficients of x and y. We do this by converting each pair of fractions to ones with a common denominator. Then we can combine them easily.

$\dfrac56 - \dfrac14 = \dfrac56\cdot\dfrac22 - \dfrac14\cdot\dfrac33 = \dfrac{5\cdot2}{6\cdot2} - \dfrac{1\cdot3}{4\cdot3} = \dfrac{10}{12} - \dfrac3{12} = \dfrac{10-3}{12} = \dfrac7{12}$

$\dfrac25 + \dfrac3{10} = \dfrac25\cdot\dfrac22 + \dfrac3{10} = \dfrac{2\cdot2}{5\cdot2} + \dfrac3{10} = \dfrac4{10} + \dfrac3{10} = \dfrac{4+3}{10} = \dfrac7{10}$

So the simplified expression would be

$\dfrac7{12} x + \dfrac7{10} y$

4 0

3 years ago