Posted by **Delilah** on Friday, October 26, 2012 at 8:41pm.

Use cross products to see if each pair of ratios forms a proportion. Replace each box with = or ≠.

1.

7/5 ? 15/10

=

≠

2.

6/8 ? 15/20

=

≠

Solve each problem.

3.

2/3 = 1.2/x

x = 18

x = 1.8

x = 0.2

x = 10

4.

4/5 equals 8/x plus 2

x = 4

x = 9.5

x = 2

x = 8

Create a proportion and solve.

5.

A recipe uses 3 cups of flour to make 48 cookies. How much flour is needed to make 72 cookies? (1 point)

3/48 = 72/x, x = 1,152 cups

3/48 = x/72, x = 4.5 cups

3/48 = x/72, x = 2 cups

x/48 = 3/72, x = 2 cups

Here are my answers. Are they correct? Thanks!

1. ≠

2. =

3. 1.8

4. x = 8

5. 3/48 = x/72, x = 4.5 cups

- 7th grade math Ms.Sue please! -
**Ms. Sue**, Friday, October 26, 2012 at 8:50pm
Yay! All are right!

- 7th grade math Ms.Sue please! -
**Delilah**, Friday, October 26, 2012 at 8:51pm
Thanks! You're really truly the best!

- 7th grade math Ms.Sue please! -
**Ms. Sue**, Friday, October 26, 2012 at 8:52pm
You're very welcome!

But YOU did these problems! :-)

- 7th grade math Ms.Sue please! -
**Iliza**, Wednesday, November 28, 2012 at 6:00pm
Ms.Sue ur very nice

- 7th grade math Ms.Sue please! -
**Shawn Mendes is bae**, Monday, November 2, 2015 at 9:33am
1. ≠

2. =

3. 1.8

4. x = 8

5. 3/48 = x/72, x = 4.5 cups

100%

- 7th grade math Ms.Sue please! -
**CorrectInator**, Thursday, December 3, 2015 at 4:06pm
I hereby dub thee- CORRECT!

- 7th grade math Ms.Sue please! -
**Mariana W.**, Wednesday, January 13, 2016 at 10:34am
Thank you! 5/5 100% thank you CORRECTINATOR and Shawn Mendes Is Bae are correct! GREAT JOB Delilah! :D

- 7th grade math Ms.Sue please! -
**Salted Caramel**, Wednesday, January 13, 2016 at 1:01pm
They are right!!! I got a 100%!

- 7th grade math Ms.Sue please! -
**Bapper**, Wednesday, January 13, 2016 at 9:33pm
Yay! Thanks guys :)!

- 7th grade math Ms.Sue please! -
**Cuddlefish <3**, Tuesday, January 19, 2016 at 10:51am
Thank you, all of you! 5/5, 100%!!!

- 7th grade math Ms.Sue please! -
**Ethan's bae and I have no friends**, Monday, October 24, 2016 at 7:38pm
Wait I got different ones from three down

- 7th grade math Ms.Sue please! -
**Anne Onimus**, Sunday, November 27, 2016 at 1:51pm
Correct!!!!!!!!!!!!!!!!!!!!!!!!!!!!tHNX

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