So far this semester, zachary has test scores of 92, 98, 65, 77, 91, and 85. he has one more test to take before the semester ends. what must he score on the last test to earn an average of 85 for the semester? type a numerical answer in the space provided.

Explain how you can use the associative property to evaluate (7x50)x4.

Can you me find the missing length. i attached an image.

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books