Angle a and b are C) supplementary angles
Answer:

Step-by-step explanation:
The equation for a line is y=mx + b where m represents the slope
If a line is perpendicular to another line, it's slope is the negative reciprocal of the other line's slope.
The reciprocal of -4 is 
And the negative of that would be 
$9147 x 12 =190,764
12 is how many months there is in a year
350 x 3/7= 150
There are 160 boys who attend the school.
10 y plus 9 y minus 6 y plus 6 y
=> 10y + 9y - 6y + 6y
= 10y + 9y - 0 = 19y