Lesson 8
17. Solve -12 = a + 6.
a. 18
b. -6
c. -18
d. 6
18. Solves" 18 = 8.
a. 26
b. -26
C. 10
d. -10
Lesson 8
15. Write the phrase "135 less a number" as a variable expression. Use x to represent "a number."
a. 135 - x
b. 135
c. x+ 135
d. 135x
16. Solve b + 12 =14.
a. -26
b. -2
c. 2
d. 26
C17I College Math - Page 8.41
Lesson 8
9. Write the phrase "The sum of a number and 122" as a variable expression. Use x to represent "a number."
a. 122x
b. x + 122
c. 122
d. 122 - x
10. Write the phrase "19 plus a number" as a variable expression. Use x to represent "a number."
a. 19
b. 19x
c. 19 - x
d. 19 + x
Lesson 8
19. Solve 18 " n = 21
a. 39
b. -39
c. 3
d. -3
7
20. Solve X + 1 -8 = -85
a. 8
b. 13
c. 467
Limon 8
7. Evaluate the expression for the given replacement values and choose the alternative that best expresses the answer.
2xz for x = -3, z 6 18
a.
b. 6
c. 2
d. 12
8. Evaluate the expression for the given replacement values and choose the alternative that best expresses the answer.
3x-2 x = 10, y =-2 for y
a. -16
b. 28
c. 32
d. -14
C171 College Math - Page 8-37
Lesson 8
3. Evaluate the expression for the given replacement values and choose the alternative that best expresses the answer.
x" y + z for x = 23, y = 9, z = 3
4. Evaluate the expression for the given replacement values and choose the alternative that best expresses the answer.
x + 2z for x = 4, z = -5
a. -6
b. 9
c. -1
d. 14
Lesson 8
13. Write the phrase "36 decreased by a number" as a variable expression. Use x to represent "a number."
a. x - 36 36
b.x
c. 36x
d. 36 - x
14. Write the phrase "A number less 15" as a variable expression. Use x to represent "a number."
d. x - 15
L088011 B
5. Evaluate the expression for the given replacement values and choose the alternative that best expresses the answer.
2 + (3y " 2) for y = -6
a. -14
b. -18
c. -6
d. -10
6. Evaluate the expression for the given replacement values and choose the alternative that best expresses the answer.
x' " 3y for x = 4, y = -4
a. 0
b. 24
c. 76
d. 52
mason 8
Achievement Exam
Select the single best answer for each question or statement, then go online to commu.nity.ashworthcollege.edu and enter your answers.
1. Evaluate the expression for the given replacement values and choose the alternative that best expresses the answer.
6+ 5x for x = 3
a. 21
b. 11
c. 9
d. 30
2. Evaluate the expression for the given replacement values and choose the alternative that best expresses the answer.
-y - z for y = -2 and z = 6
a. -8
b. 8
c. -4
d. 4