Solve for x in parts below:​

Y=4x^2+x-1 solve using quadratic formula

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

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 +"