Simply plug two in for x :)
f(2) = 4(2) × 2 + 5
f(2)=8 × 2 + 5
f(2)=16 + 5
f(2)=21
There's your answer :) (I just assumed that 2 was being multiplied when you said 4x2)
Answer:
Ashley should have added 4.5 to both sides.
Step-by-step explanation:
Given expression:

Ashley's solution:
Subtracted 4.5 to both sides and got,

Correct solution:
Adding 4.5 to both sides.


∴ 
Error made by Ashley was subtracting 4.5 both sides. Instead he should have added 4.5 both sides.
B and d
The answer is B
Hope it helped