Math Review - Day 1

Combining Like Terms

100

Simplify:

2(x+y) - 3(x+y)

-x - y

200

4(5x+2) - 2(4x-8) - 5

12x + 19

300

5x(2-3y) - 2(2x-5xy)

6x - 5xy

400

2(2x+3y²+5) - 6(3x+6y²-3)

-30y²-14x+28

500

2x(2x+3y-6) - 3(y²-x+4)

4x²-3y²+6xy-9x-12

Standard Equation to Slope-Intercept

100

-2x + y = -5

y = 2x - 5 

200

-6x + 2y = 10

y = 3x + 5

300

5x - 3y = 2

y = (5/3)x - (2/3)

400

2(4x -2y) = 10

y = 2x - (5/2)

500

2x + 7y = -7

y = (-2/7)x - 1

Systems: Graphing

100

y = 4x + 3
y = -x - 2

(-1, -1)

200

y = -2x + 2
y = -2x - 2

No solution.

300

y = (-1/2)x - 1
y = (1/4)x - 4

(4, -3)

400

y = -1
y = (-5/2)x + 4

(2, -1)

500

y = (-1/2)x - 2
y = (-3/2)x + 2

(4, -4)

Systems: Elim/Sub

100

y = 3x - 2
x - y = 4

(-1, -5)

200

y = 2x - 10
y = 4x - 8

(-1, -12)

300

2y = 2x + 12
y = -2x - 3

(-3, 3)

400

4x + 3y = -5
-2x + 2y = 6

(-2, 1)

500

8x + 3y = 13
3x + 2y = 11

(-1, 7) 

Arithmetic

100

-3x = 123

x = -41

200

3(2 + 2²) - 5 x 3

3

300

(5³ + 6 - 4 + 12) x 0 - 5 = ?

-5

400

5/0 = ?

Undefined.

500

((6 + 3 / 2² + 7 - 40 x 3³) / 3) x 0 =

0.