Alan is 8 years older than sarah. the sum of alan's and sarah's ages is 62. how many years old is alan

What expression is equivalent to 42x-56y

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs