Which equation shows a slope of 3 and a y-intercept of (0,7)? y = 7x + 3
y = −7x + 3
y = 3x
y = 3x + 7

Step-by-step explanation:

General equation of a line:

m is the slope, and c is the y-intercept:

m = 3, and c = 7

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