Need help with math! If Show the work! Use a system of linear equations to solve each question.?

1. Suppose you is starting an office cleaning service. You have spent $ 315 on the computer. To clean an office, using $ 4 worth of supplies. Is charged $ 25 per office. Like many offices must clean the balance point? 2. In a canoe trip, Rita rowing upstream (against the current) at an average speed 2 mph on to the riverbank. On the return journey downstream (with current), their average speed was 3 mph. Search for speed Rita paddling in calm water and the current velocity River. 3. Kay spends 250 minutes per week exercising. The proportion of time devoted to aerobic exercise time spent weight training is 3 to 2. How many minutes per week have to spend in aerobics? How minutes per week does not engage in weight training? 4. Suppose you invest $ 1500 in the team to put pictures on shirts. You buy each T-Shirt for $ 3. After placing a picture on a shirt, you sell it for $ 20. As many T-Shirts must sell to break even?

1. 4x 25 = 314 2. idk 3. 3x + 2y = 250 4. 3x + 20y = 1500 im sure you can go the rest of mathematics.

The Canoe ~ A Guided Meditation Exercise