Answer:
f=24km/h
Step-by-step explanation:
Alright, here's what we know.
He travels 2 hours at a fast speed, lets call that speed f km/h
He then travels 3 hours at (f-10) km/h
In these 5 hours, he travels 90km
So we have the formula velocity = distance/time. If you don't know where that formula comes from, let me know and I'll explain.
So we have:
d and t are given to us as 90 and 5 respectively
v is going to be his average speed, so we take 2 times the fast speed plus 3 times the slower speed and divide it by 5. This gives us the average speed he traveled over the 5 hours.
2f+3f−30=90 by cancelling the 5's in the denominator and expanding 3(f−10)
5f=120
f=24km/h
So his faster speed is 24 km/h. Let me know if this solution did not make sense to you at any point.
Answer: I believe its Option 2
Step-by-step explanation: Sory if im wrong
Answer:
Answer is (A) 8
Step-by-step explanation:
Answer:
Step-by-step explanation:
Minutes is the x axis, and Distance is the y axis.
At 1 minute it looks like Cassie ran much less than 20 yards and Hector ran much further than 20 yards, so Hector started running faster.
Looking at the y axis at 100yards, it looks like Cassie finished at exactly 5 minutes, but Hector only made it to 80 yards. So Cassie won because it was a 100-yrd race.
You can see Hector stopped and rested for 1 minute once he reached 60-yrds. He stopped after 2 minutes.
You can write 1/4 as a decimal, equivalent fraction, and a percent.
To change 1/4 into a decimal, divide the numerator by the denominator. You will get 0.25. To make 1/4 into a percent, multiply the decimal by 100 or just move the decimal two places to the right. The percent is 25%. To make 1/4 into another equivalent fraction, multiply the numerator and denominator by the same number. For example, you can multiply the numerator by 2 and the denominator by 2. So, another equivalent fraction for 1/4 is 2/8.
Hope it helps :)