Ratios and Proportions
What ratio shows the relationship between 12 oranges to 17 apples?
12:17 OR
12/17 OR
12 to 17
What type of number is expressed as a whole number over a whole number?
Rational Numbers!
What is the difference between an expression and an equation?
The equal sign!
What is true about the relationship between measures of complementary angles?
Complementary angles add up to 90 degrees!
Surveying every 10th person who enters the school is an example of what type of sampling?
Systematic sampling!
A car travels 240 miles in 3 hours. How far does it travel in one hour?
The car travels 80 miles in one hour.
What is the product of 1/2 and 6/7?
6/14
Simplify the following expression using Order of Operations:
62 - 8(4 + 5)
-36
What type of angles have a sum of 180o?
Supplementary Angles.
You have found that 3 people in your class of 24 have April birthdays. If there are 400 students in the school, how many of them would you estimate to have April birthdays?
50 April birthdays.
What ratio is equivalent to 18/15 using lesser terms?
6/5
What is the sum of 1/14 and 6/7?
13/14
Expand the expression using the Distributive Property:
3(8+x)
24+3x
Rounded to the nearest tenth, what is the area of a circle with a radius of 4 cm?
50.2 cm2
What is the median of the following set of data:
5, 10, 3, 4, 6, 17, 19, 1, 3, 6, 3
Median = 5
What would the PROPORTION look like for the following information:
20 is 50% of 40
Hint: A proportion is a fraction equal to a fraction...
20/40 = 50/100
What is the difference between 6/7 and 1/2?
5/14
Factor the following algebraic expression:
3x - 12
3(x - 4)
What is the volume of a rectangular prism if B=17cm2 and h=4 cm?
68 cm3
What are the 1st and 3rd quartiles of the following set of data:
5, 10, 3, 4, 6, 17, 19, 1, 3, 6, 3
Q1 = 3
Q3 = 10
Your dog eats 7/8 lb. of food in 4 meals. How much food does your dog eat in 1 meal?
Your dog eats 7/32 lb. per meal.
A student got 71 out of 85 possible points on a test. What % correct did the student score? What is the equivalent decimal?
(Must have both values to answer!!)
83.5% AND
0.835
Solve for x:
3x-12 = 36
x = 16
What is the surface area of a cube with side lengths of 6 meters?
216 meters2
Fill in the blank:
To find the _______ of a set of data, you must first add all of the values, then divide the sum by the number of values.
Mean or Average!