Answer:
The answer to your question is B = 82.5°
Step-by-step explanation:
Data
A and B are supplementary angles
A = x
B = x - 15°
Process
1.- Write and equation to solve this problem. As these angles are supplementary the sum equals 180°.
A + B = 180°
2.- Substitution
x + x - 15 = 180
3.- Solve for x
2x = 180 + 15
2x = 195
x = 195 / 2
x = 97.5
4.- Find the measure of angle B
B = x - 15
B = 97.5 - 15
B = 82.5°
m = 3
-3m - 6 = 6 - 7m
-3m + 7m = 6 + 6
4m = 12
m = 12/4
Since she read half of the book, it's 50%+ the 40% she read yesterday, that make 90%.So she is left with 10%
B, 5 : 1
Right : Wrong
10 : 2
Simplify (Divide both sides of the ratio by 2)
5 : 1
B
Hope this helps :)
