Please help, At a festival 2/7th of the number of girls was equal to 3/5th of the number of boys.
There were 165 fewer boys than girls, how many children were at the festival in all?

465

Step-by-step explanation:

Let the number of girls at the festival be g

Let the number of boys at the festival beb

The conditions are;

2/7 g = 3/5 b (i)

g-b= 165 (ii)make g the subject of the expression

g= 165 +b(iii)use this equation in (i)

2/7 (165 +b)= 3/5 b multiply both sides by 7

7*2/7(165+b) =3/5*7 b

2(165+b)=21/5 b multiply both sides by 5

5*2(165+b) = 21/5*5*b

10(165+b) = 21 b open brackets

1650 +10 b = 21 bcollect like terms

1650 = 21 b- 10 b

1650 = 11 b divide both sides by 11

1650/11 = 11b/11

150 = b = number of boys

Using equation (ii) where g-b =165  ;  g-150 =165 , g= 165+150 =315 number of girls

Total number of children at the festival = 150+315 =465

answer: yes i agree that you should not put it on/p>

step-by-step explanation: the reason for this is that it wastes other peoples time and also make them fail as well and that is never good.

the above table 1 will calculate the population size (n) after a certain length of time (t). all you need to do is plug in the initial population number (no), the growth rate (r) and the length of time (t). the constant (e) is already entered into the equation. it stands for the base of the natural logarithms (approximately 2.71828). growth rate (r) and time (t) must be expressed in the same unit of time, such as years, days, hours or minutes. for humans, population growth rate is based on one year. if a population of people grew from 1000 to 1040 in one year, then the percent increase or annual growth rate is 40/1000 x 100 = 4 percent.

step-by-step explanation: