Rational Numbers and Inequalities
Is 16 – (-16) positive, negative or zero?
Positive (32)
Simplify. 12x – 5(4x - 7)
- 8x + 21
Express 9.45% as a decimal.
0.0945
Given the numbers 1,2,3,4,5,6,7,8, what is the probability of landing on an odd number?
4/8
What is the radius of a circle given a diameter of 10.
5
Find the product. 4/5 * -7/9
- 28/45
Subtract. (-5x – 9) - (2x - 2)
- 7x - 7
Heidi went to Oliver’s Restaurant and spent $54 on her meal. She left her waitress an 18% tip. How much money did she leave as the tip?
$ 9.72
Given the numbers, 17,13,28,21,19 what number is the median?
19
Two angle measures represented by 3x + 4 and 5x are supplementary. Find the value of x.
22 degrees
Solve: 6n + 8 >20
n > 2
Katy bought a candy bar for $1.35, and a 4 pack of water. Her total cost was $5.35. Write an equation to solve for the price of each water bottle.
1.35 + 4x = 5.35
Is this scenario a proportional relationship? It costs $200 to rent a car for 4 days and $190 to rent the same car for 8 days. Explain.
No. The ratios are not the same.
Find the range of the data set: 12,32,18,26,22
20
<A and <B are complementary. If <A is 26 degrees, how many degrees is <B?
64
Write the inequality that represents the following situation.
There were at least 11 apples in the bag.
x ≥ 11
Solve for x: 2/3 x − 9 = 7
x = 24
Of 400 students in the 7th grade, 80 are left-handed.
What percent of the students are left-handed?
20%
In a box plot, describe how to identify the median.
a line in the middle of the box
What is the circumference of a circle whose radius is 6 in ? Leave in terms of π.
12π in
If you are standing at the top of a mountain 5,872 feet above sea level, and there is a submarine at 242 feet below sea level, what is the distance between your elevation and the submarines elevation?
6114 ft
Three quarts of orange juice and a quart of milk cost $7.39.
If a quart of milk costs $1.59, how much does a quart of orange juice cost?
$1.93
During a sale, a dress is marked down from a selling price of $80 to a sale price of $56. What is the percent of change?
30% decrease
How do you find the interquartile range in a box plot?
Subtract Q3 - Q1. (the top of the box minus the end of the box)
What is the area of a circle that has a radius of 7 yards? Leave in terms of π.
49π yds2