Can someone help me solve this

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.

When solving a logarithm equation, how do you find the missing variable ?

Is a triangle with angle measures 46 degree,35 degree and 100 degree possible