7th Topic 1 through 4 SDSA Review

Topic 1

100

-45 + 45

0

200

-16 - (-9)

-7

300

Is the following number rational? Why or why not?

-16.4545454545...

Yes - repeats

400

-4 * -8

32

500

100/-5

-20

Topic 2

100

What is the better deal? 12 oz for $6.80 or 16 oz for $8

16 oz for $8

200

Hadley paddled a canoe 2/3 mile in 1/4 hour. How fast did she paddle in miles per hour?

8/3 or 2 2/3 mph

300

What is the constant of proportionality? y = 2.54x

2.54

400

Describe a proportional table.

All ratios are equivalent (mult or div x by the same number)

500

A recipe calls for 15 oz of flour for every 8 oz of milk. If you use 15 oz milk, how much flour should you use?

28.125 oz flour

Topic 3

100

What percent of 14 is 32?

229%

200

At noon, a tank contained 10 cm water. After several hours, it contained 7 cm of water. What was the percent change?

30%

300

Find the percent markdown for an $80 jacket that is on sale for $48.

40%

400

Edward deposited $6000 into a savings account 4 years ago. The simple interest rate is 3%. How much money did Edward earn in interest?

$720

500

Ria has a container with a volume of 1.5 liters. She estimates the volume to be 2.1 liters. What is the percent error?

40%

Topic 4

100

Evaluate the expression when d=1.2: 3d-4

-0.4

200

Simplify -3.7 + 5g + 4k + 11.1 - 10g

-5g + 4k + 7.4

300

Expand the expression: -1/3(y - x)

-1/3y + 1/3x

400

Factor the expression: 6a + 10

2(3a + 5)

500

(0.25n - 0.3) - (0.8n - 0.25)

-0.55n - 0.05

Misc

100

Describe a proportional graph.

Straight line that goes through (0,0)

200

Change this fraction to a decimal: 23 4/5

23.8

300

If Hector is 8 years old and Mary is 3 years old, how old will Mary be when Hector is 16?

11

400

(2x + 5) + (-8x - 4)

-6x + 1

500

(-15)+(-39)

-54