3 years ago

Which girl can become my friend

Mathematics

1 answer:

katrin2010 [14]3 years ago

6 0

Answer:

I can be your friend

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Solve the equation (linear equation)<br><br> <img src="https://tex.z-dn.net/?f=8%5E%7B2x%2B7%7D%20%3D%20%28%5Cfrac%7B1%7D%7B32%7

Minchanka [31]

Answer: $x=-1$

Step-by-step explanation:

By the negative exponent rule, you have that:

$(\frac{1}{a})^n=a^{-n}$

By the exponents properties, you know that:

$(m^n)^l=m^{(nl)}$

Therefore, you can rewrite the left side of the equation has following:

$(\frac{1}{8})^{-(2x+7)}=(\frac{1}{32})^{3x}$

Descompose 32 and 8 into its prime factors:

$32=2*2*2*2*2=2^5\\8=2*2*2=2^3$

Rewrite:

$(\frac{1}{2^3})^{-(2x+7)}=(\frac{1}{2^5})^{3x}$

Then:

$(\frac{1}{2})^{-3(2x+7)}=(\frac{1}{2})^{5(3x)}$

As the base are equal, then:

$-3(2x+7)=5(3x)$

Solve for x:

$-6x-21=15x\\-21=15x+6x\\-21=21x\\x=-1$

8 0

3 years ago

Please help me fast

solong [7]

Answer:

5/4 do the 2 lines then add1 then u get the anwswr

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Rachel mom 5 lawns in 8 hours at this rates how many can she mom in 40 hours

TEA [102]

Answer:

Step-by-step explanation:

8times5 is 40
8h is 5 lawns
5 times 5 is 40

5 0

3 years ago

PLEASE HELP ME WITH THIS

Elenna [48]

9514 1404 393

Answer:

$0.50/lb

Step-by-step explanation:

The increase in cost is $40-25 = $15 for an increase in weight of 50-20 = 30 lb. That makes the cost per pound be ...

cost/pounds = $15/(30 lb) = $0.50/lb

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3 years ago

What is the geometric mean of 7 and 9.

kirza4 [7]

<span>√63 = 3√7 is your answer</span>

4 0

3 years ago

Which girl can become my friend​

Which girl can become my friend