HELP!! I need help with homework. math homework. for math we had to figure out how many miles per hour you were going if you knew the distance and time, i can't figure it out!
PROBLEMS:
1. 170 miles in 80 minutes
2. 27 miles in 35 minutes
3. 114 miles in 48.4 minutes
2006-10-30 11:25:53 · 9 answers · asked by Anonymous in Education & Reference ➔ Homework Help
Did you try the formula D=RT?
D is distance
R is rate
T is time
Just plug the numbers in.
1. 170=r(80)
r=2.125 miles per minute
2. 27=r(35)
r= 27/35 miles per minute (or round to decimal)
3. 114=r(48.4)
r= approx. 2.355 miles per minute (rounded three decimal places)
Then convert miles per minute to miles per hour by multiplying by sixty. You can handle it from there...
2006-10-30 11:30:29 · answer #1 · answered by Anonymous · 2⤊ 0⤋
1. 170 miles per 80 minutes, divide 80 by 60 to get hours = 80/60 = 4/3.
= 170 miles per 4/3 hours, divide 170 by 4/3.
= 127.5 miles per hour.
2. 27 miles in 35 minutes, divide 35 by 60 to get hours = 35/60.
= 27 miles per 7/12 hours, divide 27 by 7/12 = 27 * 12 / 7
= 46.29 miles per hour.
3. 114 miles in 48.4 minutes, divide 114 by 48.4 to get miles per minute.
= 2.355 miles per minute, multiply by 60 to get miles per hour.
= 141.32 miles per hour.
2006-10-30 11:37:34 · answer #2 · answered by dokntowhy 1 · 0⤊ 0⤋
Well figure that you if go a mile a minute then you go 60 miles per hour.
2006-10-30 11:34:20 · answer #3 · answered by Doug H 2 · 0⤊ 0⤋
1....divide 170 by 80=? x 60 minutes=127.5 mph...2. same thing....27 divided by 35=? x 60= 46.28mph....3. same thing...114 divided by 48.4=? x 60 =141.32...ciao
2006-10-30 11:31:00 · answer #4 · answered by livewire 2 · 0⤊ 0⤋
just plug them all into this equation: distance = rate times time
and then solve.
i'll help you with the first one!
80 minutes is 1.33333 hours
1. 170= 1.33333r
r=170/1.3333
r= 127.5 miles per hour
2006-10-30 11:36:06 · answer #5 · answered by chococat 4 · 0⤊ 1⤋
Divide the minutes by 60 to get the number of hours. Then divide the number of miles to the hours that correspond to the miles. then you've got the miles per hour.
Answers:
1.3333 Miles per hour
46.28 Miles per hour
141.3222 Miles per hour
2006-10-30 11:29:32 · answer #6 · answered by petercom10 3 · 0⤊ 2⤋
I get:
1. 127.5 mph
2. 46.2857 mph
3. 141.3223 mph
using ratios to solve: 170/80 is as X/60 solve for X
80X = 10200
X= 127.5
2006-10-30 11:44:47 · answer #7 · answered by getting2old2quick 3 · 0⤊ 0⤋
1. 127.5 Mph
2. 46 Mph
3. 3.8 Mph
Just divide miles by time then multiply times 60
2006-10-30 11:30:34 · answer #8 · answered by Timothy C 5 · 0⤊ 1⤋
it would be alot easier if u got into your car and drove that fast
2006-10-30 11:27:59 · answer #9 · answered by Anonymous · 0⤊ 1⤋