Grade 9 Math Review

Linear Equations

100

What is the slope in y=-3x+7?

-3

200

find the slope of a line with points (4,5) and (-3,2)

3/7

300

What is the y intercept of the line y=2x-4

-4

400

rearrange the equation to y=mx+b form 3x+4y-12=0

y=(-3/4)x-3

500

find the y-intercept of a line with slope=2 and which goes through point (4,6)

-2

Exponents

100

simplify (x)(x)(x)(x)

x^4

200

what is 1/2 squared?

1/4

300

(2x^2y^4)(3xy)

6x^3y^5

400

6x^4y^6z/3y^3

2x^4y^3z

500

3x(4x^2+2xy+3y^2)

12x^3+6x^2y+9xy^2

Solving Equations

100

solve for x

2x+4=10

3

200

4x=2

1/2

300

3x-5=-6x-8

x=-1

400

2(x/4+5)=12

x=4

500

-2(2x+5)=10

x=-5

Angles

100

draw two parallel lines and a traversal (line going through them). Indicate any two angles that are equal.

answers vary

200

What do the interior angles of a triangle sum to?

180

300

Two lines are crossing in an "x" pattern, what should all 4 of the interior formed angles sum to?

360

400

a triangle has on angle with "x" degrees, one angle with "2x" degrees and one angle with "3x" degrees. How big is x?

30

500

a 5 sided shape (angles sum to 540) has angles with the following values x x-3 x+6 x+5 3x find the value of x

7x+8=540 x=76