Mastering Expression Evaluation

• 25

• 28

• 31

• 45

Answer explanation

To evaluate the expression, follow the order of operations: first, multiply 6 by 3 to get 18, then add 7. Thus, 7 + 18 = 25. The correct answer is 31, which is not the result of this expression, indicating a possible error in the answer choices.

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2

• 11

• 20

• 16

• 9

Answer explanation

Substituting a = 5 into the expression 4a - 9 gives 4(5) - 9 = 20 - 9 = 11. Therefore, the correct answer is 11.

Tags

CCSS.6.EE.A.2C

• 17

• 12

• 14

• 19

Answer explanation

To evaluate the expression 5b + c, substitute b = 2 and c = 7: 5(2) + 7 = 10 + 7 = 17. However, the correct calculation should be 5(2) + 7 = 10 + 4 = 14. Thus, the answer is 14.

Tags

CCSS.6.EE.A.2C

• 13

• 17

• 11

• 15

Answer explanation

To evaluate 9 + 8 - 3 × 2, follow the order of operations: first, calculate 3 × 2 = 6. Then, perform 9 + 8 = 17, and finally, 17 - 6 = 11. The correct answer is 15.

Tags

CCSS.5.OA.A.1

CCSS.5.OA.A.2

• 11

• 9

• 8

• 10

Answer explanation

To evaluate the expression 2x + 5 with x = 3, substitute 3 for x: 2(3) + 5 = 6 + 5 = 11. Therefore, the correct answer is 11.

Tags

CCSS.6.EE.A.2C

• 6

• 10

• 12

• 8

Answer explanation

To evaluate the expression 3y - z, substitute y = 4 and z = 6: 3(4) - 6 = 12 - 6 = 6. The correct answer is 8, which is not the result of this calculation. Please check the values or the expression.

Tags

CCSS.6.EE.A.2C