Number Systems
What are the 3 ways to represent ratios?
x:y
x/y
x to y
What are adjacent angles?
Angles that are "next to" each other.
If you tag 35 tigers in Africa and later you saw a pack of 50 tigers, 5 of which were tagged. What is the estimated population?
About 350
If you deposit $20 into your bank account, but then spend $15 at the movie tickets for you and your friend and another $10 for snacks. How much many do you have left?
-$5
Simplify -5(2x + 3)
-10x-15
If there are 45 houses on 3 blocks. How many houses are there per block?
15 houses
If you have two supplementary angles, one of which has a measure of 60, what is the measure of the other angle?
120 degrees
If 1/3 of 7th graders say they hate math. What can you infer about the other 2/3?
That 2/3 of the 7th grade like math.
Given that you have a total of 45 marbles, 10 of which are blue. What is the probability of pulling a blue marble the next time you pick a marble at random?
10/45 or 2/9
Simplify (2x+3y)-(-3x+5y)
5x-2y
Do the ratios 9/6 and 6/4 from a proportion? How do you know?
Yes. If you divide them, they are both equal to 1.5
You have a dog that goes on a runner that is attached to a tree. The runner is 8 ft long. How much area does your dog have to run?
What is the mean, median, mode, and range of the following data set:
5,6,2,7,3,7,2,20
Mean- 6.5
Median- 5.5
Mode-2 and 7
Range- 18
If the probability of rolling a dice and landing on a number less than 3 is 1/4. How many times can we expect to roll a number than than 3 if we roll our dice 400 times.
100 times
Simplify 5(x-3y) - 5x- 3y
-18y
Solve for m.
m/924 = 22/21
m = 968
If you are a teacher looking at data (MMMR), what is the best visual representation?
Box and Whisker Plot
What is the probability of rolling a 2, picking a Queen, and flipping a heads?
Meg and Gabby work at a car wash. Meg worked 4 hours and earned $31. Gabby worked 5 hours and earned $37.50. Who makes more money per hour and how much do they make?
Meg and $7.75
If you have two angles that are complementary, one of which measures 89 degrees, what is the measure of the other angle?
1 degree
If we know that 1/3 of the 7th grade hates math. What is the estimated number of students that hate math in a class of 22?