Math It Up

Linear Equations

100

2x=16

x=8

200

3x+4=19

x=5

300

3x+2=5x-4

x=3

400

3(x+2)+4x=20

x=2

500

2(5−d)=2−4d

d=-4

Exponential Functions/Expressions

100

B(t)=2500⋅2^0.01t when t=25years

In 25 years, the population of black bears at the park will be about 2973 bears.

200

T(m)=21+74⋅10^−0.03m when m=10minutes

58.09 

300

Lana sent a chain email to 10 of his friends. The number of people who got the email increases by a factor of 1.4 every week.

What expression gives the number of people who got the email after 3 weeks?

10⋅1.4³

400

9900(1+0.023)⁷

11608.1933

500

Benjamin invests $400 in a savings account that earns 5% interest each year.

What expression does not give the correct balance in the account after 333 years?

400(1−0.05)³

Inequalities

100

4x≤12

x≤3

200

−8x≥−5

x≤40

300

x+5≤−4

x≤−9

400

17x>−17

x>−1

500

8x+2>34

x>4

Functions

100

f(x)=5x−3 when x=-5

f(5)=22

200

k(x)=6x+100 when x=-5

k(−5)=70

300

h(x)=17+6x when x=-18

h(−18)=14

400

k(x)=6x+100

k(−5)=70

500

h(t)=50−5/t when t=35

h(35)=43

Y-Intercepts

100

3x+2y=5

(0,5/2)

200

−5x−4y=10

(0,−2.5)

300

y+1=3(x−4)

(0,−13)

400

2x+5y=−6

(0,−1.2)

500

y=8x−18

(0,−18)