Angle Z = Angle R = 35 degrees
Angle Y = 180-70-35 = 180-105 = 75
35 & 75 degrees
12a-(4b+4a)-b
12a-4b-4a-b
=> 8a-5b
The answer is 11, because 165 divided by 15 is 11 :)
If 25% is 80, 100% is 320. 60% of 320 is 192.
To find A' they used the rule of multiplication, which is:
the derivative of a product of two terms is the first term times the derivative of the second term plus the second term times the derivative of the first.
To find b' they just isolated b'