Write the equation of the line that passes through the points (-4,8) and (1,3)

y = -x+4; Use the slope formula (y2-y1/x2-x1) and work backwards using that formula.

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180

c. 16 units

step-by-step explanation:

mark brainliest and have a great day!