Sandy wants to put up a border in her room. One section of the border is 7 1/3 feet long and she needs 3 1/2 sections of the border. Write and solve an equation that will help you figure out how long the border sections are all together. please help!

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

Find the solution of each of the following.

Precalculus question, image attached.