How to solve for x: 2x+y=3 and x+y=9

How much hours is it from 7:45AM-4:00PM?

Find the mean of the first 10 counting numbers (1 through 10)

Of regular movie goers, 40% watch romantic movies, 60% watch action movies, and 24% watch both types. Are watching romantic movies independent or dependent of watching action movies?

When the sum of two negative mixed numbers an integer?

A delivery person uses a service elevator to bring boxes of books up to an office. The delivery person weighs 190 lb and each box of books weighs 40 lb. The maximum capacity of the elevator is 900 lb.

A can of soup has a volume 12 fluid ounces about how many milliters is this? A) 12 mL B) 120mL C) 29.6mL D) 355mL

A shoe store is offering a 25% discount on all pairs of shoes in the store. Every store employee gets an addtional 15% off the already discounted price. How much will an employee have to pay for a pair of shoes that has an original price of $80? A.

A rectangular solid has sides of 4cm, 6cm, and 8cm. What is it's surface area?

Why do some screws have flat tips?

What is the best esimate for the following quotient 891.3:28