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Proportional Relationships
Percent of Change
Discounts and Sales Tax
Literal Equations
Weighted Averages
100
n/52=25/100
What is n=13?
100

from 48 to 64

33%

100

10% off of $49.00

What is the Sale price?

$44.10

100

Solve for L

A = LWH

L=A/WH

100

 tests  weighted: 70% and daily grades weighted: 30%,  

 Tests: 96%, 97%, 93%, 91%

 Daily Grades: 71%, 97%, 92%, 100%

93%

200
n/48=50/100
What is n=24?
200

from 82 to 34

59%

200

15% off of $25.00

what is the sale price?

$21.25

200

Solve for m:

m - t = p

m=p+t

200

The slugging average of 5 singles, 2 doubles, 1 triple, 1 homerun with 20 at-bats.

.800

300
n/25=48/100
What is n=12?
300

from 500 to 200

60%
300

35% off of $540.00

What is the sale price?

$351

300

Solve for x:

xy = z

x=z/y

300

Homework Avg.: 80

Quiz Avg.: 84

Test Avg.: 74

Final Exam: 60

If the teacher weights Homework at 20%, Quizzes at 30%, Tests at 40%, and the Final Exam at 10%, what is Jason’s class average?

77?

400
n/40=25/100
What is n=10?
400

from 346 to 233

33%

400

6% sales tax on $44.10

What is the total cost?

$46.75

400

Solve for y:

y - b = mx

y=mx+b

400

Test average: 90% (40%)

Quiz average: 80% (40%)

Final exam: 70% (20%)

The final grade is this.

82%

500
n/32=50/100
What is n=16?
500

from 254 to 103

59%

500

8% sales tax on $351.00

what is the total cost?

$379.08

500

Solve for w

5w+12c=9

w = (9 - 12c) / 5

500

 Test average: 40%                    Tests: 85 

Final exam grade: 25%               Final exam: 84 

Homework: 25%                        Homework: 90 

Participation: 10%                     Participation: 95

87%