Integers
What is the rule for multiplying and dividing integers
Same Signs=Positive
Different signs=Negative
The angles of a triangle have to add up to ______.
180
Does the order of the numbers in the ratio matter, or can you write it in any order?
For example: The ratio of apples to oranges. Does it matter which goes first?
Yes! It matters! Apples would have to go first.
To make a decimal a percent, move the decimal how many times in which direction?
2 times to the right!
Define population and sample
Population is a whole
Sample is a part/small group
10 - 15 = _________
-5
Define complimentary and Supplementary angles.
Complimentary add up to 90 degrees.
Supplementary add up to 180 degrees.
5/20 = x/100
25
3 out of 5 is what percent?
60%
I was wondering if more students are bus riders, car riders, or walkers. I asked 12 student who walked into the hall when all remaining bus riders was called. Is this a biased or unbiased survey?
biased
20 - (-30) =____
50
What angle is supplementary to 35?
What angle is complimentary to 35?
Supplementary: 145 degrees
Complimentary: 55 degrees
Are 7/11 and 21/55 proportional?
no
When you cross multiply,
11x21=231
55x7=385
Your bill at a restaurant is $15. You tip 20%. How many dollars is your tip?
$3
Find the median:
2, 2, 2, 4, 5, 7, 8, 10, 12, 13
Median=6
Then, multiply your answer by -7.
-35
If a circle has a radius of 7 in., what is the area? Use 3.14 for pi.
307.72 inches squared
Create a fraction that is proportional to 4/6.
Answers may vary
You are buying a $58 shirt. It is 40% off. How much does it cost?
$34.80
Find the mean:
5, 7, 15, 6, 11, 12, 14, 21
Mean=11.375
-15 x (-2) x (-3)=____
Then, add 10.
-80
A circular pool has a radius of 10 feet. What is the distance of the outer wall? Use 3.14 for pi.
62.8 Feet
4 books cost $12. How much do 16 books cost?
$48
Original Number: 107
New Number: 86
Find the percent of change. Increase or Decrease?
19.6% decrease
Find the MAD:
5, 9, 6, 7, 8
Mean=7
MAD= 1.2