CA-YL Unit 1A Test 2 Review

CA-YL Unit 1A Test 2 Review

Perimeter, Averages, Estimating, and Vocabulary

Algebraic Vocabulary

• Terms: the individual pieces of an expression, separated by a + or - sign

• Coefficient: the number being multiplied in front of a variable

• Constant: a number that has NO variable attached to it

Multiple Choice

How many terms are in this expression?

4² + 2x -7

• 1

• 2

• 3

• 4

Multiple Select

What are ALL of the constants in the equation?

• 3

• -5

• -2

• 8

• -6

Multiple Select

What are ALL of the coefficients in the equation?

• 3

• -5

• -2

• 8

• -6

Estimating Word Problems

• If you're estimating the price of gas, round using the rule "5 or more, raise the score; 4 or less, let it rest".

• If you're estimating how much money each person gets when a total has been divided, always ROUND DOWN.

• If you're estimating how much you can afford, always ROUND DOWN.

• If you're estimating how many containers you will need, always ROUND UP.

Multiple Choice

Estimate the cost of getting 14 gallons of gas, if each gallon costs $2.359.

• $33.02

• $33.03

• $5.93

• $5.94

Multiple Choice

Three friends went in together on a raffle ticket, and they won a total of $100. How much money will each friend get, if they split it equally?

• $33.33

• $33.32

• $33.00

Word Problems About Averages

• To find the average, you add up all of the numbers and divide by how many numbers there were.

• If you know 4 of the numbers and want to find what the 5th number needs to be in order to get a certain average, set it up like this: $\frac{45+30+32+36+x}{5}=40$  

• To solve, multiply both sides by the denominator, and then subtract to get x by itself.

Multiple Choice

Andrew's test grades so far are 60, 72, 65, and 78. What does Andrew need to make on his next test in order to have a 70 average?

• 5

• 75

• 65

• 70

Perimeter Word Problems

• To find perimeter, you add up all of the side lengths.

• If you don't know what the side lengths are, write an algebraic expression that relates one side to the other.

• Use that algebraic expression to write an equation set equal to the perimeter.

• Solve for the first side, then use that side to find the other length.

• Remember, your side lengths should all add up to equal the perimeter!