Grant decided to buy some cookies from Tiff Treats and have them delivered. Tiff Treats charges an initial delivery fee of $3.00 plus $0.50 each mile. If m represents the miles, write an equation that could be used to find d, the total cost of his delivery.

Given the function f(x) = 3x + 1, evaluate f(a + 1). a. 3a + 1 b. a + 2 c. 3a + 4

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Pls! does anybody know a shortcut for answering these types of questions in the future?