Algebra 1 Ch2

Percents

100

What is 10% of 100?

10

200

What is 86% of 134?

115.24

300

What percent of 36 is 16?

44%

400

What is the percent change? 

OG: 27

New: 30

11% Increase

500

What is the Percent Change? 

OG: 873

New: 781

10.5% Decrease

Proportions

100

3/7 = 9/x

x = 21

200

6/15 = a/4

a = 1.6

300

3/-7 = -9/t

t = 21

400

x/10 = 2.5/4

x = 6.25

500

You are making a model of an airplane with a wingspan of 25ft and length of 20ft. Your model has a wingspan of 15in. What is the length? 

12in

Variables Both Sides

100

3h + 5 = 6h + 20

h = -5

200

3(x - 4) = 12 - 3x

x = 4

300

Solve for x:

x - 2y = 3n

x = 3n + 2y

400

Solve for x:

y = mx + b

x = (y - b)/m

500

Solve for x:

m - 3x = 2x + p

x = (m - p)/5

Rates & Conversions

100

6.5 ft to inches

78 inches

200

720 minutes to hours

12 hours

300

135 seconds to minutes

2.25 min

400

You can bike 2 miles in 10 minutes. How fast can you go in miles per hour? 

12 mph

500

A bread slicer runs 20 hours per day for 30 days and slices 144,000 loaves of bread. How many loaves per hour are sliced?

240 loaves per hour