Which situations are modeled by linear functions?
choose all answers that are correct.
a. nicole's hair grows at a rate of 1/2 in. per month.
b. julian adds 5 laps to his swimming routine every week.
c. an insect population doubles every week.
d. the value of a stock increased 12% every year for 4 years.

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?