What is the answer to the system of equations?

11. a particular type of cell doubles in number every hour. which function can be used to find the number of cells present at the end of h hours if there are initially 4 of these cells? a. n = 4 ()" b. n = 4(2)" c. n = 4 + (2)" din = 4 +"

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

What is the sum of 25x + 15y and (-18x - 6y)