Solve these problems.

1-4 Find the area of the shaded region. 1. y4 y = 5x- x 2. y= Vx+2 (4. 4) 1=2 Y= X V= x+1 3. V4 4. 1=- 4y (-3.3) V= I x=ly-yz13-18 Sketch the region enclosed by the given curves and find its area. 13. v = 12 2 65-12 Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Draw a typical approxi- mating rectangle and label its height and width. Then find the area of the region. Syme. yer- l x--l, x-l 6. y = Inx, xy =4 x-l x-3 8. y = x' - 2x, y=x+4 9x=1-y x-y-l 10. 4x + y' - 12, 1 = y 11. x = 2y, x=4+y- 12. y = sin x, y = 2x/m. x20