If a triangle has a corner that is 80° and the other is 40° what is the value of the third corner

W-16=-12 solve each one step equation plz

Write the summation to estimate the area under the curve y = 1 + x2 from x = -1 to x = 2 using 3 rectangles and right endpoints

The width of a piece of rectangular land is 5m shorter rhan 1/3 of its length .find the width of the land if the length is 60m,150m.