D>7
To write an inequality means to write an expression where one side is greater than the other, or less than the other. In this case, we are to write an inequality that shows that John will have more than 7 dollars in his bank account. The variable we are to use is d, which will represent the number dollars in his bank account. If he wants to have more than seven dollars, then d will have to be greater than seven.
Answer:
x-y=5 just solve it to get the answer
Slope is
![\text{m}=\frac{y_1-y_2}{x_1-x_2}=\cfrac{10-2}{1-(-3)}](https://tex.z-dn.net/?f=%20%5Ctext%7Bm%7D%3D%5Cfrac%7By_1-y_2%7D%7Bx_1-x_2%7D%3D%5Ccfrac%7B10-2%7D%7B1-%28-3%29%7D%20)
Then you use the equation
![\text{y=mx+b}](https://tex.z-dn.net/?f=%5Ctext%7By%3Dmx%2Bb%7D)
Where b is the y-intercept. To find it, plug in x and y from one of the points. Say, point 1 (1,10):
![10=m(1)+b](https://tex.z-dn.net/?f=10%3Dm%281%29%2Bb)
You know m (from above) and now you can solve for b.
Rearrange terms:
![y-b=mx](https://tex.z-dn.net/?f=y-b%3Dmx)
And that will be the answer.
Make sense?
Answer:
Step-by-step explanation:
Given as :
The distance cover while running =
= 5 miles
Let The speed for running = ![S_1](https://tex.z-dn.net/?f=S_1)
The distance cover with bike =
= 80 miles
The speed for biking =
= 15 mph + ![S_1](https://tex.z-dn.net/?f=S_1)
Total Time taken = 5 hours
Now Time = ![\dfrac{\textrm Distance}{\textrm Speed}](https://tex.z-dn.net/?f=%5Cdfrac%7B%5Ctextrm%20Distance%7D%7B%5Ctextrm%20Speed%7D)
∴ 5 hour =
+ ![\frac{D_2}{S_2}](https://tex.z-dn.net/?f=%5Cfrac%7BD_2%7D%7BS_2%7D)
Or, 5 hour =
+ ![\frac{80}{15+S_1}](https://tex.z-dn.net/?f=%5Cfrac%7B80%7D%7B15%2BS_1%7D)
Or, 5 hour = ![\frac{75 + 5 S_1 + 80 S_1}{S_1(15+S_1)}](https://tex.z-dn.net/?f=%5Cfrac%7B75%20%2B%205%20S_1%20%2B%2080%20S_1%7D%7BS_1%2815%2BS_1%29%7D)
or, 5 × (
) = ![85 S_1 + 75](https://tex.z-dn.net/?f=85%20S_1%20%2B%2075)
Or,
-
= 0
or,
= 0
or,
= 0
Or,
= 0
Or,
= 0
Or,
= 0
∴
= 3 , - 5
So, the running speed = 3 mile per hour
And the biking speed = 15 mph + 3 mph = 18 mile per hour
Hence The running speed of Stu is 3 mile per hour . Answer