Question

What is the value of the function f(x)=2x+5 when x=3
a) 8
b) 11
c) 13
d) 28

Answer 1

b) 11

Explanation:

step 1: f(3)=2(3)+5

substitute (plug in) the value of x which in here is 3

step 2: 2(3)=6 +5= 11

follow order of operations

P - parenthesis

E- exponent

MD- multiply and divide from left to right

AS- add and subtract from left to right

Answer 2

f(x) =2x+5

=2*3+5

=6+5

=11

=b