1: Evaluate x•y+9•X-3 when x=7 and y=10 2: Evaluate 140=(x+9)+(x+4)2 when x=1

(show steps)

He secknd step was the answer to them

Ithink the answer is $2.10

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.