Using the relation in part b, what is the value of x if f(x) = 99?

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

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

Select the lengths in centimeters that would form a right triangle