Answer:
18
Step-by-step explanation:
f(x) = 2(x)^2 +5 sqrt(x+2)
Let x =2
f(2) =2(2)^2 +5 sqrt(2+2)
= 2 *4 + 5 (sqrt(4))
= 8 + 5*2
= 8 + 10
= 18
A. x = 5
3x + 9 = 24
→ Minus 9 from both sides
3x = 15
→ Divide both sides by 3
x = 5