La Dominica Cesar and Sashi

Systems of equations

100

|7k|=49

k=7   k=-7

200

8x+6y=36

y=-4/3+6

300

|20x|>2

x<-10   X>10

400

substitution  x-8y=-20

                  4x-12y=-40

(4,2)

500

elimination 2x+4y=10

                4x+10y=10

(10,5)

Linear equations

100

which is the slope-intercept formula 

y=mx+b

200

what is point-slope form?

y-y=m(x-x)

300

through: (-8,-4), slope=1/4

y=1/4x+1

400

through (4,4), parallel to y=1/2x+3

y=1/2x+2

500

through (9,5) perp y=1/4

y=1/4x-1

Quadratics and Parent Functions

100

coordinates f(x)=(x+9)²

(0,9)

200

what shape is this f(x)=lxl

A v shape 

300

coordinates (x)=(x+9)²+6

(-6,9)

400

what shape is this F(x)=x

Its a U

500

coordinates (f)=(x-4)²-4

(4,-4)

Factoring

100

Foil (4x+8) (2x-10)

8x²-24x-80

200

GCF 10a²+5-175x²+25a

5(2a²+1-35a²+5a)

300

factor by grouping 6x+2x+9x+3

(3x+1) (2x+3)

400

trinomials (x²+11x+10)

(x+1) (x+10)

500

trinomials 6x²+54x+10

unfactorable