Taking 30% percent of something is the same as multiplying by .3
so, .3*20 = 6
B is the correct answer because it shows the solution set of an inequality
Answer
associative property of addition.
129 + 6 = £135
135 (divided) 9 = 15
Therefore Colin worked 15 hours
Hope this helped :)
Angles A and B are known as adjacent angles, which always sum to 180 degrees.
Therefore, angle A plus angle B = 180
We also know that angle B = 2 * angle A so we can say that
angle A + 2 * angle A = 180
3 * angle A = 180
Therefore, angle A = 60 degrees (and angle B = 120 degrees)
Source:
http://www.1728.org/quadpar.htm