The first one is
left at 2(A + B)
The second one is
A^2 + 2AB + B^2 The expanded version is greater than A^2 + B^2 See below for why.
(A + B)^2 / [2(A + B) ] = (A + B)/2 which is what is left over when (A + B)^2 is divided by the first one.
(A + B)^2 / (A^2 - B^2) = (A + B) * (A + B) / [(A + B) (A - B)] = (A + B) / (A - B) which is less than (A + B)/2 for (A - B)>2
The third one is just A^2 + B^2 which is smaller than the second one by an amount equal to 2AB. Since A and B are both > 0, 2 AB must be > 0
A^2 - B^2
This equation should equal 0.3x+2=g, but dont take my word on it.
Answer:
2 hours is the answer because when you are rounding to the nearest tenth they both will be $15.70.
12 + 4 + 30 + 16 + 18 = 80
80 ÷ 5 = 16
16-12=4
16-4=12
30-16=14
16-16=0
18-16=2
4 + 12 + 14 + 0 + 2= 32
32 ÷ 5 is 6.4
YOUR ANSWER IS 6.4
