A national park keeps track of how many people per car enter the park. Today, 57 cars had 4 people, 61 cars had 2 people, 9 cars had 1 person, and 5 cars had 5 people. What is the average number of people per car

The average number of people per car is 2.91

Step-by-step explanation:

To find the average number of people per car, we divide the total number of people by the total number of cars.

We have that:

57 cars had 4 people

61 cars had 2 people

9 cars had 1 person,

5 cars had 5 people.

Number of people:

57*4 + 61*2 + 9*1 + 5*5 = 384

Number of cars:

57 + 61 + 9 + 5 = 132

Average:

384/132 = 2.91

The average number of people per car is 2.91

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1