What is the variable in the following expression: ∏ · r2
r
100
8 is what percentage of 40?
20%
100
There are 4 green skittles. 6 red skittles, and 10 yellow skittles in a bag. What is the probability of pulling out a yellow skittle? P(yellow)
10/20 or 1/2
100
What is the mean average?
Add up all of the numbers and divide by how many numbers there are.
200
18 ÷ 6 + 7 · 8
59
200
Solve the following: 8n = 72
9
200
36% of 300 is what?
108
200
Jamie took 20 pieces of colored paper and put them in a hat. Four pieces were red, four pieces were blue, and the rest were green. She pulls a piece of paper out of the hat. What are the chances that the paper is red?
4/20 or 1/5 or 0.2 or 20%
200
What is median?
The number sitting in the middle of the data.
300
(15 – 5 · 2)2 – 3 · 7
4
300
Solve the following: 9n + 4 = 67
n = 7
300
What percent of 75 is 15?
20%
300
Steven has a bag of 20 pieces of candy. Five are bubble gum, 4 are chocolates, 3 are fruit chews, and the rest are peppermints. If he draws one piece of candy what is the probability that it will be chocolate?
1/10 or 0.1 or 10%
300
Find the mode and range of the following: { 7, 15, 3, 17, 19, 3}
mode = 3
range = 16
400
n + (n + 2)2 when n = 4
40
400
c/4 – 3 = 2
c = 20
400
Jamera answered 90% of her test correctly. If she answered 18 questions correctly, then how many problems in total were there?
20 problems
400
There are 4 green skittles. 6 red skittles, and 10 yellow skittles in a bag. What is the probability of pulling out a red skittle and then a green skittle if we eat the red skittle and do not replace it?
24/90 or 12/45 or 4/15
400
Find the mean of the following: {2, 2, 5, 3, 3, 1, 1, 7}
mean average = 3
500
88 ÷ b - 3n when b = 11 and n = 2
2
500
4n = 20 + 2n
n = 10
500
Jeremy can read 15 pages in only 20 minutes! At this rate, how long does it take Jeremy to finish a 225 page book?
300 minutes
500
Mr. Lenzner has 4 ties, 3 shirts, and 2 belts. How many total combinations of clothing does he have? How many different outfits of 1 tie, 1 shirt, and 1 belt could he wear?
24
500
{8, 4, 6, 10, 12}, Julie says that the range of this data set is 4. Is she correct? Why or why not?
No. The correct answer is 8. She is wrong because she did not order the numbers. She should have subtracted 4 from 12 and NOT 8 from 12.