Let the speed of the boat be x
so going against the current the speed is x-7
going with the current the speed is x+7
let the distance be d
time = distance / speed
time to go against the current = d/(x-7)
time to go with the current = d/(x+7)
time going against the current is 3 times going <span>with the current
</span>
d/(x-7) = 3d/(x+7)
⇒⇒⇒ divide by d
1/(x-7)
= 3/(x+7)
x+7
= 3(x-7)
x+7 = 3x - 21
2x = 28
x = 14
So, the speed of the boat in still water is = 14 mph
Answer:
The formula used to convert Fahrenheit in to Celsius is:
Step-by-step explanation:
Here, the given expression is :
The above expression converts Celsius in to Fahrenheit.
Now we need an expression to convert Fahrenheit in to Celsius.
Simplifying the above for the value of C, we get:
Hence, the formula used to convert Fahrenheit in to Celsius is:
Answer:
5(a+b)
Step-by-step explanation:
5(a)+5(b)
5(a+b)
Answer:
Not sure about the GCF but
6(-2b+c+3)
Step-by-step explanation:
