92.5k views
4 votes
On a team, 8 girls and 7 boys scored a total of 98 points. The difference between the number of points scored by the 8 girls and the number of points scored by the 7 boys is

14. Each girl scored the same number of points and each boy scored the same number of points. Find the number of points scored by each girl and each boy.
Each girl scored
points.

User Jimmy Guo
by
7.0k points

1 Answer

1 vote

Final answer:

Each girl scored 2 points and each boy scored 0 points.


Step-by-step explanation:

Let's assume that each girl scored x points and each boy scored y points. We are given that 8 girls and 7 boys scored a total of 98 points, so we can set up the equation: 8x + 7y = 98. We are also given that the difference between the number of points scored by the girls and boys is 14, so we can set up another equation: 8x - 7y = 14.

Solving these two equations simultaneously, we can use the method of elimination. Multiply the first equation by 7 and the second equation by 8, which gives us 56x + 49y = 686 and 64x - 56y = 112. Now, subtract the second equation from the first equation to eliminate y: (56x + 49y) - (64x - 56y) = 686 - 112. Simplifying, we get -8x + 105y = 574.

Now we have a system of two equations: -8x + 105y = 574 and 8x - 7y = 14. Multiply the second equation by -105 to get -840x + 735y = -1470. Now, we can add this equation to the first equation to eliminate x: (-8x + 105y) + (-840x + 735y) = 574 + (-1470). Simplifying, we get 840y = -896. Dividing by 840, we find y = -1.067. Since we cannot have a negative number of points, we round y to the nearest whole number, which is 0. Now, substitute y = 0 back into the second equation to find x: 8x - 7(0) = 14. Simplifying, we get 8x = 14 and dividing by 8, we find x = 1.75. Again, we round to the nearest whole number, which is 2.

Therefore, each girl scored 2 points and each boy scored 0 points.


Learn more about scoring points in a team

User Cody Mikol
by
7.6k points