Answer:
i gotta say C
Step-by-step explanation:
Answer: the speed of the current is 10 mph.
Step-by-step explanation:
Let x represent the speed of the current.
Janet’s boat will go 10 miles per hour in still water. This means that the total speed at which she went downstream is (10 + x) mph.
Time = distance/speed
If he can go 120 miles downstream, then the time taken to go downstream is
120/(10 + x)
The total speed at which she went upstream is (10 - x) mph. If at the same time, she goes 40 miles upstream, then the time taken to go downstream is
40/(10 - x)
Since the time is the same, it means that
120/(10 + x) = 40/(10 - x)
Cross multiplying, it becomes
120(10 - x) = 40(10 + x)
1200 - 120x = 400 + 40x
120x + 40x = 400 + 1200
160x = 1600
x = 1600/160
x = 10 mph
Answer:
Irrational; the product of an irrational number and a rational number is irrational.
Step-by-step explanation: idk but my teacher said that the awser
A simple equation you could use to find the score James got on his first test would be x+18=86 where x is the score he received on the first test.
<u>Solution</u><u />
x+18=86
-18-18
x=68
With this in mind, using the equation we created, we know that James received 68 points on his first test.
