TSI Math Review

Front

If the $3.80 large popcorn was on sale for 25% off, what is the discounted price?

Back

$2.85

Front

If y varies inversely as x, and y = 4.5 when x = 10, find x when y = 5.

Back

9

Front

What is the solution to the system? 5x - 3y = 17, x + 3y = -11

Back

( 1 , -4 )

Front

Lillian’s test grades during the past five weeks were 90, 97, 100, 100, 92. What grade will she need to get on this week’s test in order to have an average of 95?

Back

91

Front

If xy + 12 = 6x + 7 , find y if x = 5.

Back

5

Front

What is the formula for calculating the average of a set of numbers?

Back

Average = (Sum of all values) / (Number of values)

Front

Define inverse variation.

Back

Inverse variation occurs when one variable increases while the other decreases, such that their product is constant.

Front

What is the method to solve a system of equations graphically?

Back

Plot both equations on the same graph and identify the point(s) where they intersect.

Front

What does it mean for two numbers to be inversely proportional?

Back

If one number increases, the other decreases, maintaining a constant product.

Front

How do you calculate a percentage discount?

Back

Discount = Original Price × (Discount Rate / 100) and then subtract from the original price.