If you are considering speed regardless of direction, the average speed is:
(24 + 16) / 2 = 40 / 2 = 20mph
Although if direction matters, then one number has to be negative since the directions are opposite:
(24 - 16) / 2 = 8 / 2 = 4mph (in the positive direction)
Answer :
m = 13.4/4.65
Step by step :
7.8 + 2(0.75m + 0.4) = -6.4m + 4(0.5m - 0.8)
7.8 + 2.75m + 0.8 = -6.4m + 4.5m - 4.8
2.75m + 6.4m - 4.5m = -7.8 - 0.8 - 4.8
4.65m = 13.4
m = 13.4/4.65
Your answer is A
distribute the 8 to the 4x and 2 which gives you
=32x + 16 + 4 >_ 5
now you need to add the 16 and the 4
which leaves you with
=32x + 20 >_ 5
then subtract the 20 from both sides
then you have
=32x >_ -15
then divide 32 from both sides with gives you
x>_ -15/32 or x>_ -0.5