Aparallelogram with all angles measuring 90 degrees is what type of quadrilateral

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.

Use sigma notation to represent the following series for 9 terms.

Solve the equation. 2x - 8(x+1)= 6(2x - 3)