Test 2 review

simple equations

100

x+3=12 

x=9

200

3x-10=14

x=8

300

y/5=-2

y=-10

400

a+0.93=1.42

a=0.49

500

4/5y =24

y=30

Multi-step equations

100

4a+8a=12

a=1

200

3x-7=2x

x=7

300

3(x+1)=8x-12

x=3

400

2n-4(n-3)=26

n=-7

500

7(x-9)=3(x-2)

x=14.25

literal equations

100

a=bx for x 

x=a/b

200

x/r=r for x 

x=r²

300

p=a+b+c for c 

c=p-a-b

400

y=mx+b for b 

b=y-mx

500

I=prt for t 

t=I/pr

ratio and percent equations

100

75% as a decimal or fraction 

0.75 and 3/4 

200

85 points scored in 5 games 

17 pts per game 

300

$370 for 40 hours of work 

$9.25 / hr 

400

find the percent change from 80 to 100

25%

500

see white board for question 

x=17.5 y=20

word and money problems

100

bill $17.25 tip rate 15%

$2.60 

200

cost $75, markup rate 20% find mark up and retail price 

M= $15

R=$90 

300

find commission 

Sales: $29450 Rate:14%

C=4123

400

The Martins spend 5 hours traveling to Grandmas house and back home. How far does grandma live from the martins if they drove 48 mi/hr on the way grandmas house and 52 m/hr on the way back home ? 

T=2.6 

M=124.8 miles 

500

If 3 gal of 10% salt water are boiled until there are only 2 gal left, what is the percent of salt in the  remaining 2 Gal? 

15%