Aboat has a speed of 28 miles per hour in still water. the boat travels 80 miles upstream and 80 miles downstream on a river, completing the entire trip in 7 hrs. what is the speed of the current.

80+ 80= 160 miles

160 miles/ 7 hours= 22.857 miles per hour

78.59 is the mean

step-by-step explanation:

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!