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write an expression for the distance of greg's travels per hour let h stand for time in hours!

if greg runs at a speed of 8.5 mph and he runs for h hours, how far will he run?

i dont know

im really stupid no joke when it comes to math

you're not stupid, you just need more practice

say he ran for 1 hour
how far would he get?

8.5 miles?

good, in 2 hours he will go ____ miles

17

how did you get that

8.5 x 2

so if d = distance traveled, then
d = 8.5h

oh okay so it says write an expression but im confused on how to write one

ok so you'll just write 8.5h

8.5h is the expression
d = 8.5h is the equation

what about the other expression i have to write for efren

keep in mind that greg started 1/2 hour later than efren

so you have to account for that

oh & it says plus the distance he wil he will have traveled when greg leaves

so would it be greg leaving at 9:30??

okay

but i dont know what the distance formula is either thats one of the questions

distance formula:
distance = rate x time
d = r x t
d = rt

rate is known as speed

oh yeah i remember that lol

so he walked 2 miles??

yes in that half hour where he got the head start

so he walked 2 miles in the first half hour
then he walked an additional 4h miles after 9:30 am

in total, efren walked 2+4h or 4h + 2 miles

so what expression would be for efren plus the distance he would of traveled when greg left

4h + 2

4h is the amount he traveled when greg left
2 is the amount he traveled when greg was still at home

oh i see, sorry ive been up all night doing this and im annoyed and fed up :(

thats ok

to find out when the two will meet, you just set the two expressions equal to one another

8.5h = 4h + 2
and solve for h

could you help me figure that out ill try to do most my self

well you see how i got 8.5h = 4h + 2 right?

yup!

you added the time he waited to the expression

ok great, subtract 4h from both sides
8.5h = 4h + 2
8.5h - 4h = 2
4.5h = 2
what's next?

4.5 = 2 - 2 ?

4.5h is the same as 4.5 x h

how do you undo multiplication

OH! :) I know!!
4.5h/4.5 2/4.5

you divide 2 by 4.5

am i right?

you are correct

so h = ??

2/4.5 = ?

h = 0.4 repeating (so line over the 4)

so that's the rough approximation of how many hours it will take (after 9:30) for the two to meet

and for the two to travel the same distance

convert to minutes to get:
0.444*60 = 26.64
so it will take about 26.64 minutes

I'm sure you'll do fine, just keep your head up and keep practicing

thank you jim have a nice day!

you're welcome

you too