this is proportions Plz help
1. k/3=3/9
2. 1/k=4/20
3. 20/5=m/25
4. 4/7=12/g
5. 4/5=72/g
6. 10/25=r/20
7. 12/8=15/k
8. 9/12=15/n
9. 6/n=21/28
10. b/16=17.5/20
a 1
b 2
c 3
a 4
b 5
c 6
d 7
b 8
c 9
b 10 your welcome and im right so yeah no trying to say no you now how I use the coulter lol peces out
thanks for no help :(
cross-multiply in each case
I will do #4 , you do the others in the same way
4/7=12/g , the numerator of first times the denominator of the 2nd = the numerator of the 2nd times the denominator of the first
4g = 7*12
4g = 84
g = 21
3 of you answers are wrong
100% is correct thank you
To solve these proportions, you need to isolate the variable on one side of the equation. Here's how you can solve each one:
1. k/3 = 3/9
To solve for k, cross-multiply:
k * 9 = 3 * 3
k * 9 = 9
Divide both sides by 9 to isolate k:
k = 1
2. 1/k = 4/20
Cross-multiply:
1 * 20 = 4 * k
20 = 4k
Divide both sides by 4:
k = 5
3. 20/5 = m/25
Cross-multiply:
20 * 25 = 5 * m
500 = 5m
Divide both sides by 5:
m = 100
4. 4/7 = 12/g
Cross-multiply:
4 * g = 7 * 12
4g = 84
Divide both sides by 4:
g = 21
5. 4/5 = 72/g
Cross-multiply:
4 * g = 5 * 72
4g = 360
Divide both sides by 4:
g = 90
6. 10/25 = r/20
Cross-multiply:
10 * 20 = 25 * r
200 = 25r
Divide both sides by 25:
r = 8
7. 12/8 = 15/k
Cross-multiply:
12 * k = 8 * 15
12k = 120
Divide both sides by 12:
k = 10
8. 9/12 = 15/n
Cross-multiply:
9 * n = 12 * 15
9n = 180
Divide both sides by 9:
n = 20
9. 6/n = 21/28
Cross-multiply:
6 * 28 = n * 21
168 = 21n
Divide both sides by 21:
n = 8
10. b/16 = 17.5/20
Cross-multiply:
b * 20 = 16 * 17.5
20b = 280
Divide both sides by 20:
b = 14
I hope this helps you solve the proportions! Let me know if you have any further questions.