8th grade math

Graphic predictions

100

y=5x+10

y=5x+10

Infinitely many solutions 

200

y=12x+36

6x+3y=18

one solution

300

y=6x+6

2y=12x+12

Infinitely many solutions 

400

5x+6y=30

y=-5/6x+6

no solution

500

7x+2y=35     

7x-8y=24

one solution

Solve for x

100

7x+6=48

x=6

200

5x+25=30+x

x=5/4

300

5x(6+4)=2x-6

x=-1/8

400

3(4x+6)=x+12

x=-1/2

500

4x+(3x+8)-2=8x+1-(2x-4)

x=-2

Substitution method

100

y=5x+2

y=2x+8

(2,12)

200

8x+5y=45

y=6x+12

(-0.4,9.6)

300

10x+12y=60

2x+6y=30

(0,5)

400

25x+4y=100

x=5-7

(-2,37.5)

500

8x+6y=12

y=6x+2

(0,2)

Elimination method

100

7x+2y=-19

x - 2y=-21

(-5, 8)

200

2x-10y=-28

7x+10y=-8

(-4, 2)

300

10x+12y=60

x+3y=5

(6.7,-0.6)

400

6x+8y=30

5x+16y=40

(2.9,1.6)

500

8x+4y=-22

-6x+2y=30

(-4.1,13.7)

Exponents

100

8^8/8⁵

8³

200

7⁸×7⁴/7⁸

7⁴

300

4²×4³/4²×4²

4

400

(3⁶)⁴/(3⁴)²

3¹⁶

500

(3⁴)²×3⁴/(3²)³×3⁴

3²