Which of the following sets shows all the numbers from the set {1, 2.5, 3, 4.5, 5} that make the inequality 3a + 4 ≥ 13 true?

{2.5, 3, 4.5}

{1, 2.5}

{3, 4.5, 5}

{4.5, 5}

3(1)+4≥ 13
7≥ 13 
No

3(2.5)+4≥ 13
11.5≥ 13
No

3(3)+4≥ 13
13≥ 13
Yes

{3, 4.5, 5}

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.