7th Math Lab 10/31

Simplifying Expressions

100

Simplify (Combine Like Terms)

-8x-4+12x-2-x

3x-6

200

Simplify (Combine Like Terms)

-5(2g+6)-4g

-14g-30

300

Add the following

(-10x+5)+(4x-2)

-6x+3

400

Subtract the following

(-3x+9)-(2x-3)

-5x+12

500

Add and Subtract

(5x+3)+(-2x-6)-(10x+4)

-7x-7

Solving Equations

100

Solve

3x-2=-29

-9

200

Solve

n/-2+5=3

4

300

Solve

5(c+2)=20

2

400

Solve

12a+5-10a=-1

-3

500

Solve

4(x+2)-6x=10

1

Factoring

100

Factor

24x+12

12(2x+1)

200

Factor

-8x+4

4(-2x+1)

300

Factor

12x+9

3(4x+3)

400

Factor

-12x+15

3(-4x+5)

500

Factor

20x+25

5(4x+5)

Writing Equations

100

A number increased by 5 is 12.

x+5=12

200

The product of a number and 4 decreased by 3 is 20.

4x-3=20

300

The quotient of a number and 9 increased by 2 is 15.

x/9-2=15

400

In order to join a gym there is $50 start-up fee plus a $20 a month fee. If Dan spends $170, how many months has he been a member of the gym?

Write and solve an equation.

20x+50=170    x=10

500

Jan goes bowling.  The cost to rent shoes is $4 and it costs $2 per game.  If she spends $28, how many game did she bowl?

Write ands solve an equations.

2x+4=28   x=12

Mixed

100

Change the fraction to a decimal.

5/11

0.45454545....

200

Solve

-3/4+5/8

-1/8

300

Solve

-11/15-2/5

-17/15 or -1 2/15

400

Solve 

-3 1/2 * 3/4

-21/8 or -2 5/8

500

Solve 

-2 1/3/-3/5

35/9 or 2 8/9