Number 18. what is the value of f(3) if ? f(x)= -5/2x + 4 a. 0.4 b. –3.5 c. 11.5 d. –11.5 e. 3.5

f(x) = -5/2x + 4  

f(3) = (-5/2)(3) + 4

f(3) = -15/2 + 4

f(3) = -7.5 + 4

f(3) = -3.5

B. –3.5

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d