Answer:
4.5
miles
Step-by-step explanation:
Well, he runs
3
miles in
28
minutes. Also, see that
42
=
28
⋅
1.5
.
So, his journey would just be running
1.5
times, with each time running
28
minutes.
So, he runs a total of
1.5
⋅
3
=
4.5
miles
When two variables have a positive linear correlation, the dependent variable increases as the independent variable increases. So when the independent variable decreases, the dependent variable decreases as well. Both variables decrease and increase simultaneously.
Answer:
5 hours and 48 minutes
Step-by-step explanation:
The equation for finding average speed is:
Let x represent the distance for both the journey from Riley's college to home and back. We can use one variable to represent this because both distances are the same.
We also know that the total round trip took 12 hours. Let y represent the time it took for Riley to drive from college to home. Therefore the time it takes for Riley to drive from home to college is 12 - y.
Using this information, we can set up a system of equations.
<h3>Setting up a System of Equations</h3>
Multiply both sides of the first equation by "y" and both sides of the second equation by "12 - y".
Since both 65.1y and 835.2-69.6y are equivalent to x, we can set them equal to each other.
Now, we have to solve the equation for time or "y".
<h3>Solving for Time</h3>
Add 69.6y to both sides
Divide both sides by 134.7
This is the time it took for Riley to drive from college to home, therefore the time it took for Riley to drive from home back to college is:
5 hours and 48 minutes
The answer to this is A and D. A and D are both rational because they contain repeating numbers.
B) could've been the answer but it doesn't show any repeating numbers
C) Doesn't have a repeating number.
So A and D are the answers. (if there is only one option for this answer then D should be the answer)
Hoped this helped :)
Have a great day
Answer:
y=5
Step-by-step explanation:
7y-y=6y
30/6 = 6y/6
5 = y