First, you calculate David's and Brad's unit rate.
David:
6.2 mi./1/4 hr. = 6.2 m./15 minutes
In an hour, there's 60 minutes. 60 divided by 4 is 15. So 1/4 of an hour is 15 minutes.
Brad:
11.9 mi./1/2 hr. = 11.9 mi./30 minutes
Once again, there's 60 minutes in an hour, so 1/2 of an hour is 30 minutes.
Okay, observing both of the unit rates, David's speed is just about half of Brad's speed. As a result, you multiply David's unit rate twice to get the same amount of time as Brad. It's easier to solve if you think about fractions since unit rates and fractions are just about the same. Now, multiply both the numerator and denominator by 2:
6.2 x 2 = 12.4, and 15 x 2 = 30
Now that you've multiplied them by two, David and Brad are now continuing at the same average speed.
David: 12.4 mi./30 min.
Brad: 11.9 mi./30 min.
David will finish the bicycle race first since he's gone farther than Brad.
I really hope I helped! :) There are so many other ways to solve this, but here's one way that I know best. If I didn't help, I'm sorry. I tried. :(
Cost of washer: $720
Cost of dryer: $240
I've taken this test before and got it right, so you're good :)
Procedure:
If you have a fraction turn it into a decimal by doing this:
6/10= 0.6
this works because the 6 is in the tenths place and it is 6/10 as a fraction.
It works with thousandths and hundreths:
4/100=0.04
9/1000=0.009
This works with even bigger place values.
Answer:
The value of y is 14.
Step-by-step explanation:
Given,
Length of AB = 
Length of BC = 
Length of CD =
Since ABCD is an isosceles trapezoid then according to property of trapezoid which is given below;
"In any isosceles trapezoid, two opposite sides (the bases) are parallel, and the two other sides (the legs) are of equal length."
So Length of AB = Length of CD
Hence the value of y is 14.
