Number System
Simplify the expression: 32 - 4(4 - 1) -22
16
The number of students in Mrs. White's third grade class is 24. If there are 11 boys, what is the ratio of boys to girls?
11: 13
1/3x = 2
x = 6
one triangle
A student's test scores are as follows: 88, 80, 93, 98, 86
Find the mean.
89
List the numbers in order from least to greatest: 0.25, 1/8, 0.1, 3/5, 44%
0.1, 1/8, 0.25, 44%, 3/5
A survey of 60 students shows that 18 prefer fruit as their daily snack. If the school has 420 students, predict how many of them prefer fruit.
126 students
x/4 + 9 = 14
x = 20
Two angles in a triangle are 25 and 50 degrees. What is the measure of the third angle?
105 degrees
A bag contains 2 red marbles, 4 green marbles, and 6 yellow marbles. Mark picks a single marble at random. Without replacing it, he picks another marble. What is the probability that both marbles are yellow?
30/132 or 5/22
In the Sahara Desert, one day it was 136 degrees. In the Gobi Desert, the temperature was -50 degrees. What is the difference between these two temperatures?
186 degrees
A recipe uses 3/5 cup of milk to make 3/2 batches of pancakes. How much milk would you need for 1 batch?
2/5 cup of milk
17 - x = 33
-16
A wall has dimensions 10 ft by 15 ft. There is a 7 ft by 3 ft door in the wall. You want to paint the wall, but not the door. How many square feet do you need to paint?
129 square feet
Two number cubes are rolled. What is the probability of rolling a number greater than 4 on both number cubes?
4/36 or 1/9
5 5/6 - 9 1/2
-3 2/3 or -11/3
Tessa earns $36 for 3 hours of work.
a. Write an equation relating Tessa's earnings (y) to the number of hours she works (x).
b. How much money would she earn for 10 hours of work?
a. y=12x
b. $120
3(x+5)=36
x=7
A square pyramid has a volume of 384 cubic cm. The base of the pyramid has a side length of 12 cm. What is the pyramid's height?
8 cm
The amount of hours 6 students spent studying for a math test are as follows: 2, 4, 5, 5, 7, 7
Find the Mean Absolute Deviation.
8/5 or 1.33333
-1 3/5 divided by -1/4
32/5 or 6 2/5
A shirt is on sale for 30% off. After the discount, the shirt costs $21. What is the original price of the shirt?
$30
2(4x+1) - 6 = 36
x = 5
A circular playground has a radius of 5 meters. A path is built around the playground creating a larger circle with a radius of 9 meters. What is the area of just the path? Use 3.14 for pi
175.84 square meters
11 players on a basketball team scored the following amount of points in last night's game: 6, 8, 9, 10, 12, 14, 15, 15, 18, 20, 22
Find the Interquartile Range
9