Answer:
27
Step-by-step explanation:
To evaluate f(8) substitute x = 8 into f(x)
f(8) =
× 8² - (
× 8 + 3)
=
× 64 - (2 + 3)
= 32 - 5
= 27
-4x/5≥1/10
-8x≥1
x≤-1/8
x∈(-∞;-1/8]
Answer:
x = -1 and y = 6
Step-by-step explanation:
using x = -b/2a
x = -4 / 2(2)
x = -1
y = 2(-1)² + 4(-1) + 8
y = 2 - 4 + 8
y = 10 - 4
y = 6