. If there are 230 girls at the dance, how many boys are in attendance?
2007-10-22 08:10:42 · 11 answers · asked by LOU C 1 in Science & Mathematics ➔ Mathematics
b/g = 13/10
b/230 = 13/10
10b = 230 * 13
b = 230 * 13 / 10 = 23 * 13 =
b = 299
2007-10-22 08:14:51 · answer #1 · answered by Dave 6 · 1⤊ 1⤋
This is a RATIO problem, so multiplying 230 by 10/13 is completely wrong.
Proof:
10 girls /13 boys = 0.76923077
230 girls /177 boys = 1.29943502
230 girls/ 299 boys = 0.76923077
10/13 = 230/299.
Now here's how you do it:
start with an equation like this (it's easier if you have the horizontal division bar between the 10 & 13 and the 230 & x):
10/13 = 230/x
then you cross multiply 10 & x and 13 & 230 so you get:
10x = 2990
divide by 10 to get x:
x = 299
Hope that helps =]
2007-10-22 08:29:09 · answer #2 · answered by sonargirl 3 · 0⤊ 0⤋
G/B=10/13--> G/10= B/13 --> If G=230 --> B=23·13=299
Saludos.
2007-10-22 08:19:29 · answer #3 · answered by lou h 7 · 0⤊ 0⤋
10/13 230/x = ( 230*13 ) / 10 = 299
2007-10-22 09:45:49 · answer #4 · answered by Eduardo (lalo) Leal 2 · 0⤊ 0⤋
A ratio is ver resembling a fragment. the 1st ingredient you may do is upload the two ratios (7+10) and you may get 17. 17 is the denominator. because of the fact it says boys to ladies. the 7 represents the lads and the ten represents the girls folk. So it would be Boys = 7/17, ladies = 10/17 to discover the no. of boys you multiply 357 via 7/17 and you may get 147 boys. answer = 147 boys
2016-10-04 09:02:33 · answer #5 · answered by scoggin 4 · 0⤊ 0⤋
10/13 = 230/b
10b = 13*230
b = 13*23 = 299.
2007-10-22 08:20:56 · answer #6 · answered by ironduke8159 7 · 0⤊ 1⤋
ratio is 10:13 or 10/13
Boys = 10/13 * 230 = 176.9 = 177
2007-10-22 08:15:46 · answer #7 · answered by landonastar 3 · 1⤊ 3⤋
I'm pretty sure the answer is 299 Boys.
2007-10-22 08:15:52 · answer #8 · answered by xxasilentsoulxx 2 · 1⤊ 1⤋
about 190
2007-10-22 08:19:09 · answer #9 · answered by cuddlbunny2003 2 · 0⤊ 2⤋
Yahoo answers is not the right way to solve school homework(even if you are going to thumbs down me). One sure thing I do know is that if you work on your maths exercise book more often you would save time for more diffcult/befitting questions.
2007-10-22 08:17:39 · answer #10 · answered by sumita4u 1 · 0⤊ 3⤋