Question

1. select all of the expressions that have a value of 20 when y = 3. a. 2y + 7 b. 7y - 1 c. y + y² + 8 d. 3y² - 9 e. 2y + 6y - 4

Explanation:

Step1: Evaluate Option A

Substitute \( y = 3 \) into \( 2y + 7 \):
\( 2(3) + 7 = 6 + 7 = 13
eq 20 \)

Step2: Evaluate Option B

Substitute \( y = 3 \) into \( 7y - 1 \):
\( 7(3) - 1 = 21 - 1 = 20 \)

Step3: Evaluate Option C

Substitute \( y = 3 \) into \( y + y^2 + 8 \):
\( 3 + 3^2 + 8 = 3 + 9 + 8 = 20 \)

Step4: Evaluate Option D

Substitute \( y = 3 \) into \( 3y^2 - 9 \):
\( 3(3)^2 - 9 = 3(9) - 9 = 27 - 9 = 18
eq 20 \)

Step5: Evaluate Option E

Substitute \( y = 3 \) into \( 2y + 6y - 4 \):
\( 8y - 4 = 8(3) - 4 = 24 - 4 = 20 \)

Answer:

B. \( 7y - 1 \)
C. \( y + y^2 + 8 \)
E. \( 2y + 6y - 4 \)