Collin bought one T-shirt for $7.90 and another T-shirt for $12.40. What is the total amount he spent?

With these: 18/36 = 1/? missing number change 1 5/8 to improper fraction. change 19/5 to a mixed number.

The measure of an angle is 117°. what is the measure of a supplementary angle?

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years