Math 9 Semester 1 Review

Solving

100

-7x-12=-61

x=7

200

-7x-9=-2x+31

x=-8

300

8(x-4)=40

x=9

400

-3(4x-2)+5x+4=-18

x=4

500

7/4=21/x

x=12

Miscellaneous

100

What is the greatest common factor of 21 and 225?

GCF: 21

200

What is the least common multiple of 21 and 49

LCM: 147

300

The point (-8,-3) would be in which quadrant?

Quadrant 3

400

What are the coordinates for the origin?

(0,0)

500

Simplify: 5x+7x-5+6y+3-2y-3x

12x+4y-2

Input/Output

100

In the equation y=-7x+6, if y=6, what is x?

x=0

200

In the equation y=3x-2, if y=10, what is x?

x=4

300

In the equation y=-4x+5, if x=-1, what is y?

y=9

400

In the equation y=2/3x-8, if x=3, what is y?

x=-6

500

In the equation y=2/3x-1, if y=3, what is x?

x=6

PEMDAS

100

5+2(4/2)-3

6

200

(6*4)/3+7-3(2+5)

-48

300

45-6+(3^2+2)+14

64

400

6*3+4*(9/3)

30

500

12+3*8/2-14

10

Words

100

6 times a number

6x

200

The difference of 7 and a number

7-x

300

3 less than 7 times a number

7x-3

400

2 times the sum of a number and 5

2(x+5)

500

The square of the product of 6 and a number

(6x)^2