Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks. Kendra's Bakery recently spent a total of $134 on new equipment, and their average hourly operating costs are $20. Their average hourly receipts are $22. The bakery will soon make back the amount it invested in equipment. How many hours will that take? What would the total expenses and receipts both equal?​

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −