The area of a rectangle is 56 cm. the length is 2 cm more than x and the width is 5 cm less than twice x. solve for x. the round to the nearest whole number?

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

I'm confused on this could anyone me and show me what i need to do to solve it.

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.