True or False.
Pi is a rational number.
False.
Express $180 for 12 hours as a unit rate.
$15 per hour
21 is about what percent of 152?
14%
Simplify 4x + 3 - x + 12
3x + 15
Solve the equation 16 = x/-2
x = -32
Suppose a submarine is diving from the surface of the water at a rate of 70 feet per minute. Which integer represents the depth of the submarine after 6 minutes?
-420 feet
Amelia is driving to Disney for the weekend. She drove 395.5 miles in 5 hours. How many miles did she drive per hour?
79.1 miles per hour
Last year there were 21 science projects submitted by students at a science fair. This year there are 32 science projects. To the nearest tenth, what is the percent of change in the number of science projects submitted?
52.4%
Simplify -6(2 + x)
-12 - 6x
Solve the equation 5x + 6 = 21
x = 3
Write 17/30 as a decimal.
0.56666....
What is the constant of proportionality for the following coordinates: (2, 80), (3, 120), (5, 200)?
40
Jamie is hoping to purchase a new refrigerator that is priced at $545.50. There is a 8% sales tax rate. What is the total amount including sales tax for the refrigerator in dollars and cents?
$589.14
What is the GCF of 36xy and 12x
12x
Solve the equation –12p + 7 = 91
p = -7
-1 5/12 + 14 4/5
13 23/60
What is the equation of a proportional graph if it goes through the origin and the point (6, 36)?
y = 6x
Eric estimates that he will spend $155 on a new GoPro. He actually spent $205. What is the percent error? Round to the nearest whole percent.
24%
True or False
6x - 11 cannot be factored.
True.
Solve the equation 3(x + 6) = 15
x = -1
-4 4/5 x (-2 1/6)
10 2/5
The weight of an object on the moon varies directly as the weight of the object on Earth. A 144-pound object on Earth weighs 24 pounds on the moon. If an object weighs 198 pounds on Earth, how much does it weigh on the moon?
33 pounds
How much simple interest is earned on an investment of $1,450 if the money is invested for 4 years at an annual interest rate of 5.5%?
$319
Find (5x – 9) – (3x – 4).
2x - 5
Solve the inequality -4x - 17 < 15
x > -8