shyannmcmahon9991 shyannmcmahon9991

21-10-2017
Mathematics

contestada

In a class of 42 students, the number of boys is 2/5 of the girls. How many boys and girls are there?

Respuesta :

texaschic101 texaschic101

21-10-2017

b + g = 42
b = 2/5g

2/5g + g = 42
2/5g + 5/5g = 42
7/5g = 42
g = 42 / (7/5)
g = 42 * 5/7
g = 210/7
g = 30 <== there are 30 girls

b = 2/5g
b = 2/5(30)
b = 60/5
b = 12 <=== there are 12 boys

Answer Link

Otras preguntas

Please look at the picture attached.

Evaluate 3-1/3^4 I need in fraction form

Ray has $220.00 in his checking account. He writes a check to pay his electric bill for $110 and then uses his debit card to buy groceries for $150.00. After pa

What was your hardest math class you've taken?

What language do the people living in Australia speak?I am serious!!!As I am from India , I don't know so I asked.THANK YOU :)

Roseanna is working her problems from yesterday's assignment, and here is what she has down for the current problem she is working 23 - 5 = 4 (1) (722 – 5) 3 4.

Which bit of dialogue has correct punctuation? O "I want to go to the park". O "I want to go to the park," O "I want to go to the park." O "I want to go to the

Calculate the pay for the following day of a weekly time card given a wage of $12.50/hr. Name Week of: Morning In Out Monday 08:00 12:15 Afternoon In Out 13:00

h(x) = 9x2 + 1 PLSSS HELP

(1 point) The image below shows four imaginary planets. Which one would most likely have the thinnest atmosphere? A B C D a Planet A b Planet B С Planet C d Pla