It will take Jennifer 4 hours to complete her swim along the Charles River at a speed of 9 miles per hour.
Speed is the ratio of the given distance and time.
It shows how fast an object is moving at a given time.
The formula is Distance / Time.
We can find the distance or time when the required values are given using this formula.
We have,
We can use the formula:
distance = rate × time
to solve this problem.
Since Joe swam at a speed of 12 miles per hour for 3 hours, his distance is:
distance = rate × time
= 12 miles/hour × 3 hours
= 36 miles
Since Jennifer is swimming the samepath, her distance will also be 36 miles.
We can use the same formula to find how long it will take her to complete the swim:
distance = rate × time
36 miles = 9 miles/hour × time
Solving for time, we get:
time = 36 miles ÷ 9 miles/hour = 4 hours
Therefore,
It will take Jennifer 4 hours to complete her swim along the Charles River at a speed of 9 miles per hour.
Learn more about speed here:
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We can say that a relationship between two variables is a function if, for every input, we get one and only one unique output. If we want to talk about y as a function of x in this problem, we want to make sure that every x has only one y associated with it. We can do this by solving our equation for x and seeing whether we can have more than one y that satisfies that equation. Here, I'll do the algebra and briefly explain my steps:
Multiply either side by x to cancel the denominator in 1/x:
Add 5x to either side to collect all of the x terms on one side, and subtract 1 to get all of the constants on one side:
Factor an x out of the left side of the equation:
Divide either side by 3y + 5 to get the x by itself:
For every x we pick, only one y can satisfy the above equation, so we can say that yes, is a function.
B. n = 3/4 x 10/1
C. n = 10/1 x 4/3
D. n = 1/10 x 4/3
Answer:
Idk
Step-by-step explanation:
I dont know da answer, bro.
one half hour past midnight is 1:00
one o clock