I need help please help me number 3 and 4

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

What is the x-intercept and y-intercept of the equation 2x+1. 2o

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6