Answer: The running speed of Elena is 5 miles/hour and this can be determined by using the formula of speed.
Step-by-step explanation:
A circular running track 1/4 is a mile long.
Elena runs on this track, completing each lap in 1/20 of an hour.
Speed formula is used to determine the speed of Elena. The formula of speed is given by:
----- (1)
where S is the speed, D is the distance and T is the time taken by Elena to run a circle.
Now, put the value of distance D and time T in the equation (1).
Speed = 5 miles/hour
Therefore, the running speed of Elena is 5 miles/hour.
For more information, refer to the link given below:
brainly.com/question/22610586
Answer:
The solutions of the equation x^2-1=-x^2+7 are (-2,3) and (2,3)
Step-by-step explanation:
Please, see the attached file.
Thanks.
The total cost for a car with 30 miles is $20.00.
First, do 0.5 × 30 because you need to find out how much it will cost. This will give you 15. From there, add the flat rate. 15 + 5 = 20, so it will cost $20.00.
Answer:
715 ft^2
Step-by-step explanation:
Answer:
Step-by-step explanation:
10%=325
1%=32.5
325-32.5=292.5
3250+3542.5=3542.50£
So 9% increase.
