y - y1 = m(x - x1)
In this form, the given equation can be written as
y - 0 = 3(x - 5)
y = 3(x - 5)
The line passes through point (5,0) and has slope of 3.
I think this is what you're looking for.
b or 2, just plug these equations into your graphing calculator then check the graph to see the image. if it matches up then that's your answer!
the measures of a triangle equal 180. use that to find x.
now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.
because angle a is 40°, the first option doesn't work.
because angle b is 60°, the second option does work.
when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.
when you add angle a and c, you get 120°, which is not 100.