Haley pays a monthly fee of $20 for her cell phone and then pays 5 cents per minute used. The total cost of Haley's m S the number of minutes used.
monthly cell phone bill can be expressed by the function C(m) = 0.05m + 20, where
What are the domain and range of the function C(m)?

a. 74°

Step-by-step explanation:

Angle BCD and angle ACB are supplementary because they form a straight line. This means they add up to 180. We can write an equation to model the situation:

m<BCD + m<ACB = 180

106 + m<ACB = 180

m<ACB = 74

Since we are given two sides of the triangle are congruent, the triangle is isosceles. The base angles of an isosceles triangle are congruent, so we can say:

m<ACB = m<A

This means m<A is equal to 74°