I'm sorry I'm too lazy to read all of that. However, I did get the main point. The river was going at 3 mph. Since he wanted to travel 10 miles upstream and downstream, you would have to subtract 20 by 3. This would mean he was going at a speed of 17 mph.
Answer:

Step-by-step explanation:
To factor out -3/4 out of that equation, multiply and divide by -3/4.
Say ;
=
=
Now, rearranging and making necessary commutations.
=
=
Factoring -3/4 we get an equation without any fractions
= -2x + 3y
Answer: She needed 144 square feet of carpet.
Step-by-step explanation:
Given : Maria is buying new carpet. Her bedroom is in the shape of a square.
The length of each side is 12 feet.
We know that the area of square = 
So , the area of the bedroom =
[which is an exponential expression]
Simplify it
The area of the bedroom = 
Also, the carpet she needed = Area of the bedroom.
Thus , She needed 144 square feet of carpet.
Answer:
180000
Step-by-step explanation:
30600/17=1800
1800•100=180000
Answer: on point -10
Step-by-step explanation:
Because 2*-5 is -10.