{7TH GRADE} Create four (4) problems that include fractions. Solve the problems using estimation. Each problem must contain:
at least three (3) fractions
two (2) must include addition of fractions
two (2) must include subtraction of fractions.
an explanation of your reasoning process for each problem

In δabc, if the length of side b is 3 centimeters and the measures of ∠b and ∠c are 45° and 60°, respectively, what is the length of side c to two decimal places?

How do i do this? i don’t understand

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old