Question

If x = 5, then 3x + 4x - 15 equals:
A. 20
B. 15.
c. 40
D. 50
E 10

Answer 1

20

Explanation:

Given:

• x = 5

Substitute the value of x into the expression:

⇒ 3x + 4x - 15

⇒ 3(5) + 4(5) - 15

Simplify the expression:

⇒ 15 + 20 - 15

⇒ 15 + 5

⇒ 20 (Option A)

Answer 2

A. 20

given function:

• 3(x) + 4(x) - 15

put x = 5

• 3(5) + 4(5) - 15

simplify

• 15 + 20 - 15

answer

• 20