The sum of the measures of the angles of a triangle is 180 the sum of the measures of the second and third angles is nine times the measure of the first angle the third angle is 20 more than the second let XYZ represent the measures of the first second and third angles respectively find the measures of the three angles

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

2x^2+5x+17

your welcome. : )

the answer is 62.8 cubic units

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5