Practice with proofs on aleks?

Which expression is equivalent to 2x^2+7x+4?

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 +"

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.