Use cross products to see if each pair of ratios forms a
proportion. Replace each box with = or #.
1. 7/5 or 15/10
B
A
B
D
B
so, did you check the cross product?
1. not equal to
2. equal to
3. x=18
4. x=154
5. 30
Mal is right
Thank you for confirming! Please let me know if you have any other questions or if there's anything else I can help you with.
To determine if a pair of ratios forms a proportion, we can use cross products. Here's how to do it:
Step 1: Write down the first ratio and the second ratio.
In this case, the first ratio is 7/5 and the second ratio is 15/10.
Step 2: Multiply the numerator of the first ratio by the denominator of the second ratio.
7 * 10 = 70
Step 3: Multiply the denominator of the first ratio by the numerator of the second ratio.
5 * 15 = 75
Step 4: Compare the two products obtained in steps 2 and 3.
If the two products are equal, then the pair of ratios forms a proportion. If they are not equal, then the pair of ratios does not form a proportion.
In this case, 70 and 75 are not equal, so the pair of ratios 7/5 and 15/10 does not form a proportion. Therefore, we can replace the boxes with the symbol #.
1. 7/5 # 15/10