Find the measure of the arc or angle indicated. Assume that lines which appear tangent are tangent. Photo attached.

Nine more than four times a number is the same as one less than twice the number. find the number?

Someone me what is the area of this figure? 18m 18m 8m 16m

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.