Which phase matches the algebraic expression below

2(x-7)+10

I think you're wondering how to say this equation in words; you say 2 times the quantity x minus 7 plus 10. 

The unit price is 0.99

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.