PHX Jeopardy

Equations

100

-5p+1=21

What is p=-4

200

what is 5r+4=9

what is r=1

300

4(x-3)=-36

What is -6

400

-155=5(1-4x)

what is x=8

500

-100=5(2k-7)+3k

what is k=-5

Functions

100

f(x)=2x+5, find f(-7)

f(-7)=-9

200

f(x)=2x+2; find f(-1)

what is f(-1)=0

300

f(x)=x²; find f(-4)

f(-4)=16

400

f(x)=-x-6; find f(-3)

f(-3)=-3

500

f(x)=x²-6x+9; find f(0)

f(0)=9

Factoring

100

factor: x²-3x-4

(x-4)(x+1)

200

factor: x²-x+42

(x-7)(x+6)

300

factor: x²-6x+9

(x-3)²

400

factor: x²-18x+45

(x-15)(x-3)

500

factor: x²+9x+8

(x+8)(x+1)

Multiplying Polynomials

100

(n-3)(3n+2)

3n²-7n-6

200

(4a-8)(2a-7)

8a²-44a+56

300

(x+3)(2x+5)

2x²+11x+15

400

(6a+8)(7a+7)

42a²+98a+56

500

(8n+2)(8n-8)

64n²-48n-16