5x + 20 = 90 - a = 90 - (3x + 40)
5x + 20 = 90 - 3x - 40 = 50 - 3x
5x + 3x = 50 - 20
8x = 30
x = 30/8 = 15/4
b = 3(15/4) + 40 = 45/4 + 40 = 51.25
The measure of a supplementary angle is 180 - 51.25 = 128.75
Answer:
-2/3
Step-by-step explanation:
The slope of a line can be represented as
where (x1, y1) and (x2, y2) are points on the line. We can substitute the points given, (-3, 5) and (6, -1), to calculate the slope:

Answer:
9/49
Step-by-step explanation:
5 4/9 =49/9 and49/9*9/49=1 then reciprocal of 49/9 is9/49
Answer:
it is 468 inches.
Step-by-step explanation:
Make it into a simultaneous equation:
5p + 4e = 7.65
4p + 5e = 7.20
Use adding/subtracting formula
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