In a particular soccer league of 20 teams, each team plays a total of 38 games over the course of a season. Teams are awarded 3 points for a win, 1 point for a draw, and no point for a loss. Lucy's favorite team scored a total of 54 points this season and she is especially happy because the sum of games won or drawn this season exceeded twice the number of games lost by 8 games. Mark's favorite team won 2 games fewer and drew 5 games more than Lucy's favorite team this season.

  1. (a)

    Find the number of games won by Lucy's favorite team this season.

  2. (b)

    Explain, with clear workings, which team performed better this season.

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Worked solution

1(a)

1. Define variables and formulate the system of equations based on the given information.

Let WW, DD, and LL be the number of games won, drawn, and lost by Lucy's favorite team respectively.
From the total number of games: W+D+L=38W + D + L = 38
From the total points: 3W+D=543W + D = 54
From the relationship given: W+D=2L+8W + D = 2L + 8

2. Solve for the number of games lost ($L$) using substitution.

Substitute W+D=2L+8W + D = 2L + 8 into the total games equation:
(2L+8)+L=38(2L + 8) + L = 38
3L+8=383L + 8 = 38
3L=303L = 30
L=10L = 10

3. Solve for the number of games won ($W$).

Substitute L=10L = 10 into W+D=2L+8W + D = 2L + 8:
W+D=2(10)+8=28W + D = 2(10) + 8 = 28
This gives D=28−WD = 28 - W.
Substitute D=28−WD = 28 - W into the points equation 3W+D=543W + D = 54:
3W+(28−W)=543W + (28 - W) = 54
2W+28=542W + 28 = 54
2W=262W = 26
W=13W = 13

Answer

13

1(b)

1. Calculate the total points scored by Mark's team by evaluating the difference in wins and draws.

Since a win awards 33 points and a draw awards 11 point, the difference in points for Mark's team relative to Lucy's team is:
Difference in points=(−2×3)+(5×1)=−6+5=−1\text{Difference in points} = (-2 \times 3) + (5 \times 1) = -6 + 5 = -1
Points scored by Mark’s team=54−1=53\text{Points scored by Mark's team} = 54 - 1 = 53

2. Compare the points to determine the better performing team.

Lucy's team scored 5454 points, whereas Mark's team scored 5353 points.
Since 54>5354 > 53, Lucy's team performed better.

Answer

Lucy's team performed better, as they scored 54 points compared to Mark's team's 53 points.

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