Jonathan goes to the store and purchases 3 pencils for $0.28 each , and y number of erasers for $0.38 each . Write an expression that shows that much Jonathan spent .

Step by step explanation pls for 10 pts the length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?