A quadrilateral has angles that measure 125°, 1150, and 65º.
What is the measure of the fourth angle?

If the Angles are 125 + 150+ 65 then the missing angle is 20.

Step-by-step explanation:

All angles need to add up to 360 degrees.

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1