1. Prerequisite Skills
VOCABULARY CHECK 1.
Identify one ordered pair that is a solution of 8x – 5y = 22.
Sample answer: (1, 2)
ANSWER
2. Are 7x – 4 = 10 and x = 3 equivalent equations? Explain.
ANSWER
No; because the solution of 7x – 4 = 10 is x = 2, the two equations do not have the same solution.

2. Prerequisite Skills
VOCABULARY CHECK
3. The absolute value of a number a is the distance between a and on a number line. ?
ANSWER

3. Prerequisite Skills
SKILLS CHECK
Check whether the given number is a solution of the equation or inequality.
4. x – 2 = 3; 5
Solution
ANSWER
5. s + 3 =12; 9
Solution
ANSWER
Not a Solution
ANSWER
y > 20; 3 7.
p – 3 5
≤ 4; 23
Solution
ANSWER

4. Prerequisite Skills
SKILLS CHECK
Solve the equation. Check your solution.
8. m + 8 = –20
–28
ANSWER
–7x = 35 –5
ANSWER
ANSWER
–29 9
–9r – 4 = 25
t – 7t = 9 –3
ANSWER

5. Prerequisite Skills
SKILLS CHECK
For the given value of a, find a and |a|.
a = –3
3, 3
ANSWER
a = –5.6
5.6, 5.6
ANSWER
a = 14
ANSWER
–14, 14
a = 0
0, 0
ANSWER

6. Prerequisite Skills
SKILLS CHECK
Graph the equation.
y = –7x + 3
ANSWER

7. Prerequisite Skills
SKILLS CHECK
Graph the equation.
x + 3y = –5
ANSWER

8. Prerequisite Skills
SKILLS CHECK
Graph the equation.
x = –8
ANSWER

9. Prerequisite Skills
SKILLS CHECK
Graph the equation.
y = 4
ANSWER