The sum of the measure of angle A and angle B is 180°.

Question

The measure of angle A is (2z + 5)°.

The measure of angle B is 145°.

What is the value of z?
Responses
A 1515
B 1010
C 1212
D 1818

Answer 1

B 1010

Explanation: Since the sum of the measure of angle A and angle B is 180°, we can set up an equation:

(2z + 5) + 145 = 180

Simplifying, we get:

2z + 150 = 180

2z = 30

z = 15

Therefore, the value of z is 10.