Question

A physical education class has three times as many girls as boys. During a class basketball game, the girls average 18 points each, and the class as a whole averages 17 points per person. How many points does each boy score on average?

Answer 1

Let the number of boys be x.
Then the number of girls will be 3x.
The total points earned by girls=3x*18
=54x
The total points earned by the class=17(x+3x)
=17*4x
=68x
The total points earned by boys=68x-54x
=14x
Average points of boys=14x/x
=14
Is that clear?

Answer 2

@ronald_m09

Answer 3

how do you get the 4?

Answer 4

vch 4?

Answer 5

the 4x in the equation "17(x+3x)= 17*4x"

Answer 6

Total number of children in the class= number of boys+number of girls.
=x+3x
=4x
Is that k?

Answer 7

so both of the X's added together = 1? or is the x treated as 1?

Answer 8

bt y one?

Answer 9

Let the number of boys be x.
Then the number of girls will be 3x.
Is this clear?

Answer 10

I suppose, but you didn't answer my question

Answer 11

i didnt treat x as 1.

Answer 12

Do u knw like terms?

Answer 13

not really

Answer 14

Oh k then.
Like terms are terms containing the same variable with same exponents.
that is x and 2x are like terms. You can add x and 2x as adding two numbers.
In the same way x^2 and 3x^2 are like terms. U can do addition or subtraction with them. Bt u cant add x and x^2 or 2x and 3x^2. Is that clear?

Answer 15

yeah that helps

Answer 16

according to that when u add x and 3x u get 4x. Is that clear?

Answer 17

yes i understand alot better now, thanks

Answer 18

yw.:). if it is still confusiv ask me. I will try my best to clearify it.

Answer 19

ok youve been a big help thank you.

Answer 20

welcome.:)