Question

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

7/5 __ 15/10
A. =
B. ≠

6\8 __ 15/20
A. =
B. ≠

Answer 1

Simplify the fractions. If they come out equal, they will be the =. If not, use the unequal sign.

Answer 2

Do you know how to simplify?

Answer 3

Not really...

Answer 4

Ok, for 6/8, what is a common factor that they both have?

Answer 5

2

Answer 6

Great, so divide each side by two

Answer 7

3/4

Answer 8

Perfect, now what is a common factor of 15 and 20

Answer 9

5

Answer 10

And divide by 5

Answer 11

3/5

Answer 12

20/5 is equal to 4, so you would have 3/4

Answer 13

I know how to do this but I don't really get what the signs mean

Answer 14

Ok, so the = sign means that the numbers on both sides are equal. The other states that they aren't the same. It would be 2=2 and \[3\neq4\]

Answer 15

Ooh

Answer 16

So, for your problem, 6/8 turns into 3/4 and 15/20 turns into 3/4.
3/4 = 3/4

Answer 17

So the second question is A because they are equal.

For the first question, you can't simplify 7/5, but you can simplify 15/10. Simplify that and see if it is equal to 7/5. If they are equal the answer is A, if they are different, it is B

Answer 18

Let me know what you get.