Probability
The probability of Asher's soccer team winning its next game is 7/10. What is the probability of not winning their next game?
3/10
Nasir bought a circular rug that is 9 feet in diameter. What is the circumference of the rug rounded to the nearest tenth of a foot?
28.3 feet
There were 5 ice cream cones for every 3 brownies sold at the ice cream shop. If there were 24 brownies sold, how many ice cream cones were sold?
40 ice cream cones
If a 1/2 gallon of paint covers 1/3 of a wall, how much paint is needed for the entire wall?
3/2 = 1 1/2
A student wants to know which type of of pizza middle school students prefer. What is a good, representative sample of the population?
Answers may vary.
An example that is random and unbiased.
What is the probability of drawing a red card from a standard deck of cards?
26/52
Simplified: 1/2
An architect is making a plan for a new circular playground. He measure to find that the distance across the playground is 26 meters. How much fencing needs to go up to keep the kids in the circle?
81.64 m
Goldfish crackers $1.99 for 7.2 oz.
or
Cheez-its $2.70 for 13.7 oz.
Find the unit price of each and choose the better deal.
Goldfish crackers $1.99 for 7.2 oz.= $0.28
Cheez-its $2.70 for 13.7 oz. = $0.20
Cheez-its
A submarine took 25 seconds to drop from the
surface to 180 feet below sea level. What was its
rate of descent?
-7.2 ft/sec
Aliyah is interested in finding out how many of the 7th Graders will want KonaIce. She knows there are 375 7th graders, but does not want to poll all 375 students. She did a survey and determined that 22 out of every 25 students wanted KonaIce. About how many students can Aliyah predict will actually want KonaIce out of the entire 7th grade.
22/25 = x/375
330 students
Describe and give an example of the following:
Impossible - (percent, fraction, or decimal)
Unlikely- (percent, fraction, or decimal)
Equally Likely - (percent, fraction, or decimal)
Likely- (percent, fraction, or decimal)
Certain- (percent, fraction, or decimal)
Answers may vary
Impossible - 0 - 0%
Unlikely - 1/4 - 25%
Equally Likely - 1/2 - 50%
Likely - 3/4 - 75%
Certain - 1 - 100%
You are putting in a pool at your house in the shape of a rectangular prism. The length is 40 ft, the width is 20 ft and the 3-D height is 12 ft. How much water will be in the pool?
9,600 cubic ft
At an appliance store, 22 washing machines were sold last month. The goal is to sell 25% more washing machines this month. How many must be sold to meet the goal?
27.5 washing machines
Subtract:
3/4 − (−1/5)
19/20
Find the Mean Absolute Deviation (MAD):
10, 9, 3, 8, 10
Mean Absolute Deviation (MAD) = 2
You rolled a six-sided number cubes and flipped a coin same time. What is the probability of rolling a three and getting tails?
1/6 x 1/2 = 1/12
Jayden needs to paint a door in his house with the dimensions 84in x 36in x 2in. He wants to give the door 2 coats of paint. How many square centimeters of paint does he need?
13,056 cm squared
Brian and 4 friends went out to eat and decided they would split the bill. The total bill was $189.79. They also decided to leave a 15% tip. What is the price that each person paid?
$189.79 x .15 = $28.47
$189.79 + $28.47 = $218.26
$218.26 / 5 = $43.65
Dana’s savings account has a balance of $900.
• She earns $275 a week and works a total of 6 weeks.
• She put 25% of her earnings into her savings account.
What is Dana’s account balance at the end of 6 weeks?
$275 x 6 weeks earnings =$1,650
$1,650 x .25 = $412.50
$412.50 + $900 = $1,312.50
**BONUS: 1000 points**
A white circle with a radius of 10 inches is inside a perfect square with sides of 20 inches each. What is the area, in square inches, of the shaded area in black? Use 3.14 for pi.
Area square = 20 x 20 = 400
Area circle = 3.14 x (10^2) = 314
Area square – Area circle = 400 – 314 = 86 in
A stack of cards has 5 red cards and 8 blue cards. Sarah draws a card without replacement, then draws another card. What is the probability that she will draw two red cards?
5/13 x 4/12
=20/156
=10/78
=5/39
Two angles are supplementary. The measure of one of the angles is 37°. The measure of it's supplement is 9x + 17. What is the value of x?
37 + 143 = 180
9x + 17 + 37 = 180
or
9x + 17 = 143
x is 14
You opened a savings account and forgot about. After 36 months, you noticed your account drew $960 of interest at a rate of 4%. How much money did you deposit into the account when you opened it?
Remember:
Interest = Principal (money borrowed or deposited) X Rate (as a decimal) x Time (in years)
$8000
Ty'laisha has a recipe that needs 2/3 cup of sugar for every 2 cups of flour. If Ty'laisha increases the amount of flour to 3 cups, how many cups of sugar are needed?
1 cup
Find the 5 Number Summary (Min., Q1, Q2[Median], Q3, Max) and interquartile range of the data.
32, 53, 72, 66, 47, 54, 49, 67, 71
Minimum: 32
First Quartile: 48
Second Quartile (Median): 54
Third Quartile: 69
Maximum: 72
IQR: 21