Pls help on this as well

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.