Percent
A shirt originally costs $20 and is on sale for 25% off.
What is the sale price?
$15
Find the percent change. Is it increasing or decreasing?
Original amount: 625
End amount: 550
12% decrease
Two or more angles that add up to 90° represent what kind of angle relationship?
Complementary angles
There is a jar of marbles. 7 marbles are blue and 3 marbles are green. What is the likelihood of choosing a blue marble?
Use impossible, unlikely, neither likely or unlikely, likely or certain.
Likely
Which probabilities are very unlikely? Select all that are correct.
A. 1/100
B. 67/68
C. 5/6
D. 8/75
E. 2/485
Libby takes a test that has a total possible score of 800. Each question is worth the same number of points. If she misses 3% of the questions, what is her score?
776
Ms. Rendon allotted 30 minutes at the beginning of class for her students to complete a test. The last student took 42 minutes to complete the test. What is the percent error from the allotted time to the length of time the students actually took?
40%
Two or more angles that add up to 180° represents what kind of angle relationship?
Supplementary angles
There is a dozen doughnuts: 4 are glazed, 3 are chocolate frosted with sprinkles, 3 are strawberry frosted with sprinkles, and 2 are blueberry. If you pick a doughnut at random, what is the likelihood of choosing a strawberry frosted doughnut with sprinkles?
Use impossible, unlikely, neither likely or unlikely, likely or certain.
Unlikely
A spinner has 4 equal sections: red, blue, green, yellow. What is the probability of landing on blue?
1/4
A laptop costs $600. It is discounted by 15%, and then a 7% sales tax is added. What is the final price?
$545.70
Find the percent change. Is it increasing or decreasing?
Original amount: 27
End amount: 38.61
43% increase
Two angles that are opposite to each other share this angle relationship.
Vertical angles
There are
Use impossible, unlikely, neither likely or unlikely, likely or certain.
Certain
A bag contains 3 red, 5 blue, and 2 green marbles. What is the probability of drawing a blue marble?
5/10 = 1/2
A store buys a backpack for $32 and marks it up by 40%. Then they offer a 10% coupon. What is the final price after the coupon?
$40.32
Luna buys a shirt that costs $15.65. She gives the cashier $20.00 and receives $3.25 in change. What is the percent error in the amount of change she was given? Round to the nearest tenth.
*How much change should she have received?
25.3%
Two angles are complementary. One angle is 2x°, and the other is 3x°. Find x.
2x+3x = 90
5x = 90
x= 18
A jar of coins has 20 quarters, 60 dimes, and 30 nickels. What is the likelihood of selecting a penny?
Use impossible, unlikely, neither likely or unlikely, likely or certain.
Impossible
A box contains 4 pens, 6 pencils, and 5 markers. If one item is chosen at random, what is the probability it is not a pencil? Write the answer as a fraction, decimal and percent.
9/15 = 3/5, 0.6, 60%
John goes to a restaurant. His meal costs $32.57. He uses a 10% off coupon on the cost of the meal. The tax is 8%. He leaves a tip of 18% based on the original cost of the meal. How much does he spend?
$37.52
Sussex County received 46 inches of rainfall this year. The percent error in the local meteorologist's rainfall prediction was about 17%. What are two possible values for the meteorologist's prediction?
Round to the nearest hundredth.
38.18 inches or 53.82 inches
Three angles are supplementary. Angle 1 has a measure of (2x+5)°. Angle 2 has a measure of 4x°. Angle 3 has a measure of (3x-32)°. What is the value of each angle?
*Find the value of x.
Angle 1 = 51°
Angle 2 = 92°
Angle 3 = 37°
What is the likelihood of flipping a heads on a regular coin?
Use impossible, unlikely, neither likely or unlikely, likely or certain.
Neither likely or unlikely (50%)
In a videogame, a mouse walks into one of three doors: black, white, or red. Bellamy records the color of the door the mouse chooses every time he plays the game. What is the experimental probability of the mouse walking into the red door? Write as a fraction, decimal, and percent. *How many experiment trials?
Black - 13 White - 15 Red - 22
11/25, 0.44, 44%