Solve –2.8(z + 1) – (3.5z – 9) = –31.6 for z. a. –1.32 b. 0.94 c. 6 d. –7.72

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.

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