Is the expression 3(x+1 1/2)-3equivalent to 3x+1 1/2

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

The surface area of the triangular prism is .

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.