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Mathematics 15 Online
OpenStudy (pphalke):

the Iditarod sled dog race extends 1049 miles from anchorage to nome. if a musher is 4 times as far from anchorage as from nome. how many miles has the musher completed?

OpenStudy (anthonyym):

It says 4 times as far from anchorage as from nome. Anchorage to nome is 1049. 4 times that is 1049*4

OpenStudy (pphalke):

it comes up 4196 is that the answer

Vocaloid (vocaloid):

^ not quite |dw:1460833341727:dw|

OpenStudy (pphalke):

how do i solve it

Vocaloid (vocaloid):

"if a musher is 4 times as far from anchorage as from nome. " means that distance to nome = x distance to anchorage = 4x x + 4x = 1049 solve for x

OpenStudy (pphalke):

5x=1049

Vocaloid (vocaloid):

and x = ?

OpenStudy (pphalke):

209.8 but it says to round to the nearest whole number

Vocaloid (vocaloid):

we're not done yet now, x = 209.8 the musher has completed 4x miles so 4x = ?

OpenStudy (pphalke):

4x? i dont know

Vocaloid (vocaloid):

you just solved for x so what is 4 times x?

OpenStudy (pphalke):

i dont know 4x?

Vocaloid (vocaloid):

x = 209.8... so 4x = 4 times x = ...?

OpenStudy (pphalke):

i dont know how to do that im confused

Vocaloid (vocaloid):

you agree that x = 209.8 right?

OpenStudy (pphalke):

yes

Vocaloid (vocaloid):

so... 4x means "multiply the value of x by 4" so what is 4x?

OpenStudy (pphalke):

i dont know

Vocaloid (vocaloid):

you know how to multiply right?

OpenStudy (pphalke):

yea isnt it 4 times x

Vocaloid (vocaloid):

yes! so if x = 209.8, what is 4 times x?

Vocaloid (vocaloid):

what is the number that you get when you multiply x by 4?

OpenStudy (pphalke):

4 times x is 4x

Vocaloid (vocaloid):

yes, but what NUMBER is that?

Vocaloid (vocaloid):

if x = 209.8 and you take that number and multiply it by 4, what do you get?

OpenStudy (pphalke):

839.2

Vocaloid (vocaloid):

good! so 4x = 839.2 now round to the nearest whole number. what do you get?

OpenStudy (pphalke):

i dont know

Vocaloid (vocaloid):

look at the digit after the decimal point. is it less than 5 or greater than 5?

OpenStudy (pphalke):

less than 5

Vocaloid (vocaloid):

good! so we round 839.2 down to 839. and that's your answer

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