Anybody know the solution for

2x-2y=14

9x+4y=37

Phoebe runs at 12km/h and walks at 5km/h. One afternoon she ran and walked a total of 17km. If she ran for the same length of time as she walked for how long did she run

In six test runs, a truck operated 8, 10, 15, 7, 9, and 11 miles with one gallon of gasoline. at the 95% level of confidence, is this sufficient evidence to show that the truck is operating at a mean rate of about 13.

The fastest that a seahorse can travel is 2640 feet per hour. what is its top speed in miles per hour

An oil company claims that the sulfur content of its diesel fuel is at most. 15 percent. To check this claim, the sulfur contents of 40 randomly chosen samples were determined; the resulting sample mean and sample standard deviation were. 162 and.

Craig measured a length as 0.034 millimeters. What is the margin of error?

It takes Bethany 8 hours to proof a chapter of Hawkes Learning Systems' Statistics book and it takes Nina 7 hours. How long would it take them working together? (Round your answer to two decimal places.)

How many 40 tens make hundreds

Find the center and radius of circle of x^2+y^=36

A rock, dropped into a well, falls 4 9/10 meters in the first second, and at every next second it falls 9 4/5 meters more than the preceding second.

On Black Friday, everything is 20% off at Best Buy. Which expression best represents how much an item would cost after the discount?