I need help. "In 1990, the cost of U. S. postage stamp was 25 cents. In 2010, the cost of a U. S. postage stamp was 44 cents. In 20 years, what was the percent of increase in the cost of U. S. postage stamps?"
It has to be an algebraic solution and showing all your work. Thank you!

Joe has a rectangular chicken coop. the length of the coop is 4 feet less than twice the width. the area of the chicken coop is 510 square feet. what is the length of the chicken coop?

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.

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?