Practice Examples

Simplify each of the following:

 

1. 7d 3d + d

 

2. 5A 8 A + 9

 

3. Simplify 2A 5 (3A + 10)

 

4. 2(B + 4) 4(3B 5)

 

5. Evaluate the expression 3(A 4B) for A = -3, B = -2.

 

6. Evaluate the expression 3A2 3AB + 5B2 for A = -4, B = -2.

 

7. Solve for A: A 5 = -7

 

8. Solve for A: -7A = -42

 

9. Solve for x:

 

10. Solve for A: 8A + 12 = 4A 16

 

11. Solve: 5A + 3(2 2A) = 8 + A

 

12. 15% of what number is 21?

 

13. What percent of 80 is 24?

 

14. What percent of 24 is 6?

 

 

 

 

Answers:

 

1)     5d

 

2)     4A+1

 

 

3)     A-15

 

4)     28-10B

 

 

5)     15

 

6)     44

 

 

7)     A=-2

 

8)     A=6

 

 

9)     X=-20

 

10) -7

 

 

1)     -2A-2

 

2)     140

 

 

3)     30%

 

4)     25%