Lizette ran for 1.25 hours and walked for 3 hours.
distance = speed × time
Her total distance is the sum of her distances at the different speeds. Let w represent her walking speed in mi/h. For distances in miles, speeds in miles per hour, and time in hours, the problem statement tells us ...
19 = (w+5)(1.25) + (w)(3)
19 = 4.25w + 6.25 . . . . collect terms
12.75 = 4.25w . . . . . . . subtract 6.25
3 = w . . . . . . . . . . . . . . . divide by 4.25
Lizette's walking speed is 3 mph.
Lizette's running speed is 8 mph.
Answer:
Step-by-step explanation:
Note that .
Aha! We see a path to the solution!
We now know that our equation is actually .
We can divide both sides by to get .
By inspection or taking the logarithm base 2 of both sides, we see that .
So, the answer is and we're done!
1/4
both 6 and 24 can be divided by 6 so 6 divided by 6=1 and 24 divided by 6=4
the answer is 1/4
Answer: the answer is 18
Step-by-step explanation: