In a class 29 of students, 7 play an instrument and 13 play a sport. There are 13 students who do not play an instrument or a sport. What is the probability that a
student who plays an instrument also plays a sport?

Let the number of student who plays both be x

then

(7-x)+x+(13-x)+13=29

33-x=29

x=4

the probability that a  student who plays an instrument also plays a sport

= 4/29

Step-by-step explanation:

i would say the third one.

step-by-step explanation: liner would mean in a line and the only one that doesn't look like it's even thinking about forming a line would be the third one

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x