Number Systems
The temperature in Peru rose 45 degrees in 9 hours. How much did the temperature rise per hour?
5 degrees
There are 12 girls and 7 boys in a class. Express that as a ratio.
12:7
Simplify the following expression:
3x + 12 -8x + 10
-5x + 22
A coin is flipped 800 times and lands on heads 450 times. What is the probability of the coin landing on heads the next time it is flipped?
1/2
Find the area of a rectangle with a length of 12 ft and a width of 8 ft.
96 ft2
Solve:
-8 + 12 x 8 - 6
82
What makes a line proportional when plotted on a coordinate plane?
1) It starts at or passes through the origin.
2) It is a diagonal line.
Write the following as an expression:
4 less than 3 times a number
3m - 4
The weather person said that there is a .60 chance of rain tomorrow. It is likely, unlikely, or definitely going to rain tomorrow?
Likely
If a circle has a diameter of 15 inches, what is the circle's radius?
7.5 inches
Find the median of the following data:
12, 14, 18, 18, 21, 24, 36, 42, 58, 60
22. 5
Monica needs cleaning supplies. She can buy a pack of 8 gloves for $24.50 or a pack of 12 gloves for $36.24. Which pack of gloves would be a better buy and how much would she pair per glove?
The 12 pack.
$3.02
Solve the following equation:
3x + 12 = 36
x = 8
A bag contains 4 orange, 3 blue, and 3 red marbles. Find the probability of choosing an orange marble and then a red marble if you replace the marble after you choose the first one.
6/50 or .12 or 12%
If the point (-2, 4) is reflected over the x-axis, where would the new point land on the graph?
(-2, -4)
Ross is collecting dinosaur bones. He collects 4 1/2 bones on Monday, 3 3/4 bones on Tuesday, loses 2 1/2 bones on Wednesday, and then collects 4 more on Thursday. How many bones does Ross have in total?
9 3/4 or 9.75
A circular pool is designed and drawn with a radius of 8 inches. The designer used a scale of 4 inches = 6 feet. What is the length of the radius of the pool in the real world?
12 feet
Simplify:
2(3x + 9) - 4(2x - 8)
- 2x + 50
Looking at the data below, which number would be considered an outlier.
12, 14, 8, 24, 32, 7, 91, 22, 8, 11, 36
91
What type of triangle has exactly 2 equal sides and 2 equal angles?
Isosceles Triangle
Simplify:
22 1/4 + 6.5 - 8.2 + 36 1/8
56.675
Phoebe is able to fill 2 1/2 cat food bowls in 12 minutes. If she fills the bowls at the same rate, how many bowls would she fill in 1 hour.
12 1/2
Solve the following inequality:
-4m + 12 > 36
m < -6
Joey has a fair spinner numbered 1-4 and a die numbered 1-6. Find the probability of Joey spinning a 2, rolling a 4, spinning a 1, and rolling a 6.
1/144 or .006
A rectangular room is drawn with a width of 10 inches and a length of 8 inches. If the scaled used to draw the rectangle is 2 in = 5 feet, what is the actual area of the room in the real world?
500 ft2