A.) False
b.) True
c.) True
d.) True
Answer:
1 3/5 miles/hr
Step-by-step explanation:
Let C be the speed of the current
Let D be the distance between Chan's house and the park
We know that Distance, D, is = Speed x Time
-----
Chan's speed going upstream is (8 - C)mph.
That gives us:
D = (8-C)(3 hr)
Chan's speed going downstream is (8+C)mph
So we have:
D = (8+C)(2 hr)
We know that the d is the same for these two equations, so:
(8-C)(3 hr) = (8+C)(2 hr)
24 - 3C = 16 + 2C
5C = 8
C = (8/5) or 1 3/5 mph
The first question is (7)
I am better at substitution, but you want to get the equations as similar as possible, but are the opposite, so you can cancel it out.
Answer:
54
Step-by-step explanation:
You have to do the number of options in each category by itsself
