I need help with my grades and i need to do this and more so please and thank you

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

Complete the steps, which describe how to find the area of the shaded portion of the circle. find the area of the sector by multiplying the area of the circle by the ratio of the to 360. subtract the area of the triangle from the area of the sector.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.