How to solve this equation by elimination?

2x+5y=4 and 7x+y=-19

How much greater is 6/7 then 5/14

There are 50 students traveling in vans on on field trip. Each van seats 8 students. How many vans are needed

The expression d/t can be used to find the average speed of an object that travel a distance d in time t. What is sc cars average speed if it travels 145 miles in 2.5 hours?

A pie shop charges $4 for a slice of pie. They cut each whole pie into 6 slices. How much money will the pie shop make if they sell 5 pies?

Sin theta = cos theta find value of sec theta

Which of the following is the simple interest paid on a loan of $354 at 6% for six months? $12.74 $12.47 $10.26 $10.62

Two offices are participating in a weight loss challenge. The pounds lost per participant is listed below. Office (1) is 15, 5, 1, 17, 23, 16, 10, 14, 18, 3, 2, 6, 35, 9, 8, 5. Office (2) is 17, 2, 6, 18, 26, 28, 12, 5, 4, 8, 4, 4, 6, 13, 14, 11, 5.

Information does not have to be cross-checked if it comes from a site you have used before.

In a shipment of new books for a library 3/12 of the books were poetry and 2/5 of the books were biographies. The remainder of the books in the shipment were mysteries. What fraction of the books in the shipment were mysteries?

If the value of a tv is $1500, and it's value decreases by 14% each year, how do I write a function that represents the value y of the tv after t years