He wrote identity instead of commutative in step 4
Answer:
0.66
Step-by-step explanation:
Given that a survey of athletes at a high school is conducted, and the following facts are discovered: 24% of the athletes are football players, 55% are basketball players, and 13% of the athletes play both football and basketball.
Probability for a randomly chosen person is either a football player or a basketball player
=Prob for football player + Prob for basketball player -Prob for both
=
i.e. Probability reqd =0.66
Just plot the points on the graph.
2. You know since the graph is a straight line, the ratios are proportional and therefore equivalent
Given parameters:
Perimeter of the court = 100m
Unknown:
Dimensions = ?
Solution:
let the width = w
Length is 16m more;
Length = w + 16
Perimeter = 2(L + w)
100 = 2 (w + 16 + w)
100 = 2(2w + 16)
100 = 4w + 32
4w = 100 -32
4w = 68
w = 17
So, length = w + 16 = 17 + 16 = 33m
The dimensions of the court are length 33m and width 17m