1. Which ratios form a proportion? (1 point)
a. 3/15, 12/55
b. 8/24, 12/35
c. 5/18, 25/90
d. 4/11, 16/25
2. Which ratio forms a proportion with 9/15? (1 point)
a. 6/10
b. 16/21
c. 36/50
d. 45/70
1. Multiply the first numerator and denominator by 5.
2. 9/15 = 3/5
3/15 = 12/60 no
8/24 = 1/6 = 12/72 no
5/18 = 25/90, good
Now you do #2
ok! so what r the answers? I got 1.c?????? 2.a??????
6/10 = 3/5 *3/3 = 9/15 yes
what about 1?
I already told you c was right
ok thx
You are welcome.
To determine which ratios form a proportion, we need to check if the cross products are equal.
1. Let's check the first option, a. We multiply the numerator of the first ratio (3) by the denominator of the second ratio (55), and multiply the denominator of the first ratio (15) by the numerator of the second ratio (12).
- (3 * 55) = 165
- (15 * 12) = 180
Since the cross products are not equal (165 ≠ 180), a. does not form a proportion.
2. Let's check the second option, b.
- (8 * 35) = 280
- (24 * 12) = 288
Since the cross products are not equal (280 ≠ 288), b. does not form a proportion.
3. Let's check the third option, c.
- (5 * 90) = 450
- (18 * 25) = 450
The cross products are equal (450 = 450), so c. forms a proportion.
4. Let's check the fourth option, d.
- (4 * 25) = 100
- (11 * 16) = 176
Since the cross products are not equal (100 ≠ 176), d. does not form a proportion.
Therefore, the only ratio that forms a proportion with 9/15 is option c. (5/18, 25/90).