Question Below Please help i don't have much time...

- horsegal244

Question Below Please help i don't have much time...

- jamiebookeater

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- horsegal244

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- horsegal244

- phi

you did part A in the other post.

- horsegal244

120/25 = 4.8

- phi

yes A, is 4.8 inches
for part B,
can you write the ratios? give it a try.

- horsegal244

huh?

- phi

can you re-read the other post, and try to do that for part B ?

- horsegal244

I can't by myself its a completely different question...

- phi

not completely different.
first, from the first sentence in the problem you should get this:
2 inches is to 25 miles

- horsegal244

\[\frac{ 2 }{ 25 }\]

- phi

in part B, it asks about 1/4 of an inch is how many miles
write
1/4 inch is to x

- horsegal244

\[\frac{ }{ 1/4 }\]

- phi

almost. but the first ratio you wrote was 2 inches / 25 miles
notice we have inches up top and miles in the bottom
when you write 1/4 inches is to x miles, we want inches up top and miles in the bottom

- horsegal244

\[\frac{ 1/4 }{ x }\]

- phi

yes.
with ratios, we set them equal to each other
\[ \frac{2}{25}= \frac{1/4}{x} \]
the "x miles" is in the bottom (as it should be), but it would be nicer if it were up top
we can do that *if we flip* both sides

- phi

\[ \frac{25}{2} = \frac{x}{1/4} \]

- horsegal244

ok

- horsegal244

now what

- phi

it still looks a bit ugly, but we can "get rid of 1/4" by multiply top and bottom by 4

- phi

in other words we do
\[ \frac{x\cdot 4}{\frac{1}{4} \cdot 4} \]

- phi

1/4 * 4 in the bottom simplifies to 1

- horsegal244

x/1

- phi

I hope you mean 4x/1

- horsegal244

yea

- phi

\[ \frac{25}{2} = \frac{x}{1/4} \\ \frac{25}{2} =4x\]
I would divide both sides by 4 (to get x by itself)

- horsegal244

6.25 and .5

- horsegal244

- phi

25/2 is 12.5
so you have
12.5 = 4x
or
4x= 12.5
then divide both sides by 4
4x/4 = 12.5/4
x= 12.5/4

- horsegal244

ok so what would i put in the box

- horsegal244

12.5/4?

- phi

I think they want you to first simplify that

- horsegal244

3.25

- horsegal244

- phi

close. is you calculator broken?

- horsegal244

idk oh 3.125

- phi

yes, that looks good.

- horsegal244

ok that is what i put in the box?

- phi

for part B

- horsegal244

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