Question

The Boardman family walked two over five of a mile in two over seven of an hour. What is their unit rate in miles per hour?

two-sevenths over two-fifths equals one and two-fifths miles per hour
two-sevenths over two-fifths equals five over seven mile per hour
two-fifths over two-sevenths equals one and two-fifths miles per hour
two-fifths over two-sevenths equals five over seven mile per hour

Answer 1

@me11 and @angel12310

Answer 2

help!

Answer 3

1. two-sevenths over two-fifths equals one and two-fifths miles per hour
2. two-sevenths over two-fifths equals five over seven mile per hour
3. two-fifths over two-sevenths equals one and two-fifths miles per hour
4. two-fifths over two-sevenths equals five over seven mile per hour

Answer 4

those are the answers
:D

Answer 5

@phi

Answer 6

@Vickiesweet

Answer 7

You want miles per hour.
you might have noticed that this translates to the fraction
\[ \frac{miles}{hour} \]
so you should (at the least) expect to divide the miles number by the hours number
that rules out some of your choices

Answer 8

ok

Answer 9

which of the 4 choices shows miles divided by hours ?

Answer 10

3 and 4

Answer 11

right?

Answer 12

so you have 50-50 chance if you guessed at this point.
However, you can figure out the answer.

remember this useful "rule"
if you divide by a fraction, you can change the problem into
multiply by that fraction after "flipping" it.

Answer 13

can you "flip" 2/7 ?

Answer 14

yes into 7/2

Answer 15

now multiply 2/5 * 7/2
what do you get ?

Answer 16

1.4

Answer 17

btw, I would "cancel" the 2 because it's in the top and in the bottom

Answer 18

I assume you used a calculator?

But you can see the answer is more than 1, and only one of C and D have an answer more than 1

Answer 19

no I didn't actually

Answer 20

or change 0.4 into 4/10 = 2/5
so 1.4 is the same as 1 and 2/5

Answer 21

ok

Answer 22

1.4 = 1 2/5

Answer 23

yes. so now you should be able to pick out the correct choice.

Answer 24

yes, its 3

Answer 25

yes.

Answer 26

thanks so much!