Answer:
Step-by-step explanation:
Since, the miles john have cover = 12 miles.
And, the remaining days he has = 40
If d is the average miles he cover in these 40 days.
Then, the total miles he cover in 40 days= 40 d
Thus, the total miles he cover in this summer = 12 + 40 d
According to the question,
He has a goal of covering at least 100 miles in this summer.
That is, the total miles he cover in this summer ≥ 100
⇒ 12 + 40 d ≥ 100
Which is the required inequality.
Answer:
x=2.65
Step-by-step explanation:
First, we need to figure out how much the length of the sides is changing between the equations. In this case it is changing by a factor of 2.5. Now we need to work backwards. First use this equation:
This is because whatever the length of the side with x is, will be 14/2.5. So divide both sides by 2.5:
Next, add 5 to both sides:
Then divide both sides by 4:
Answer:
54 seconds
Step-by-step explanation:
Wanda's walking rate = 3 ft/s
Wanda's head start = 27 s
Dave's walking rate= 4.5 ft/s
Let 't' be time after Dave started walking
The distance walked by Wanda and Dave, respectively, as a function of 't' are given by:
The instant 't' at which Dave catches up to Wanda (both distances walked are equal) is: