Hello! So, for the first inequality, we have to add 10 to both sides. When you do that, 3.5x > 7. Then, you have to divide both sides by 3.5. When you do that, you get x > 2. Then, for the second inequality, you have to add 9 to both sides, then you would get 8x < 48. Divide both sides by 8 and you get x < 6. The compound inequality for this question would be 2 < x < 6.
always draw triangle b first. for triangle b it is reflected across the x-axis which means all y valies become negative. then for triangle c, you swap the x and y values around.
Your surface area is: S=x^2+4xh=84 square inches and h=2 inches; so you get: x^2+(4×2)x=84 x^2+8x-84=0 qhich is a quadratic equation. Using the quadratic formula you get two results for x: x1=-14 and x2=6 choose the second (positive)
