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erma4kov [3.2K]
3 years ago
8

What is the answer to -2(5-x2)=22

Mathematics
2 answers:
Nataliya [291]3 years ago
7 0
-2(5-x2)=22 I believe it’s 4 for x
-Dominant- [34]3 years ago
6 0

Answer:

x=8

Step-by-step explanation:

-10+4x=22

4x=22+10

4x=32

4x/4=32/4

x=8

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How do you solve (7^-1)^-1 and 5^2 * 5^4 * 5^-3
Katyanochek1 [597]

Answer:

Step-by-step explanation:

exponents raised to a - power  is an inverse function probably not the right word

       a^-b    =  1/(a^b)     example       4^-2   = 1/(4^2)     =  1/16

so   (7^-1)^-1  is a double inverse which is back to the original number  7

      inverted 7 twice

      (7^-1)^-1     = (1/7)^-1     =  1/(1/7)     =   7     trust me or use your calculator

since the coeffients are the same  just add the powers...  some exponent rule

     5^2 * 5^4 * 5^-3   = 5^(2+4-3)   = 5³

here is it written out

5^2 * 5^4 * 5^-3    = 5²  ×   5^4   ×  5^-3    =   (5×5) × (5×5×5×5)  × (1/5×1/5×1/5)

    5×5 × 5× (5×5×5  × 1/5×1/5×1/5)           (5×5×5  × 1/5×1/5×1/5)  = 1

    5×5×5    = 5³

   so

7 0
3 years ago
Use a word problem using integers and slove it in 3 ways
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What integers do you want the problem to be
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Round each number to the nearest tenth. What is the best estimate for the answer to 294.32 – 198.37?
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If f(x) = 3x - 8, then evaluate f(10) - f(3):
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Step-by-step explanation:

f (10) = 3×10 - 8

= 30 - 8

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f(10) - f (3) = 22 - 1

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7 0
3 years ago
What is 4.57125 rounded to?
Paul [167]

That depends.

-- If you're rounding to the nearest ten-thousandth, it's  4.5713  .
-- If you're rounding to the nearest thousandth, it's  4.571 .
-- If you're rounding to the nearest hundredth, it's  4.57 .
-- If you're rounding to the nearest tenth, it's  4.6 .
-- If you're rounding to the nearest whole number, it's  5 .
-- If you're rounding to the nearest ten, or to any larger place, it's zero.

5 0
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