Please help it’s due today

Mark brainliest!!!

1.47-1.56

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 +"

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Add the fractions and simplify 1/2+ 1/3