Answer:
1. 52
2. 2.9
Step-by-step explanation:
To find the mean, we take all the numbers, add them up then divide by the number of numbers.
1. mean height
mean = (50+54+52+56+48)/5
=260/5
=52
52 inches
2. mean score
There are 5+3+12+2+6+6+4 students = 38 students
Multiply the number of students times the score and add together
total points = (0*5+1*3+2*12+3*2+4*6+5*6+6*4)
= 111
The mean is the total points divided by the number of students
mean = 111/38
=2.92
The first triangle’s area is 48.75. But since you round it to the nearest tenth, it’s 48.7.
Use the formula a=1/2bh to find the area of a triangle.
A= 1/2• 13 • 7.5
A= 6.5• 7.5
A= 48.75 —-> 48.7 square inches.
Sorry, I can only do one because of homework, but make sure to use that formula! Hope this helped.
Answer:
111
Step-by-step explanation:
A 7-sided polygon has internal angles that sum to ...
180°(n -2) . . . . for n=7
180°(7 -2) = 900°
The sum of the given angles is 789°, so the remaining one is ...
900° -789° = x° = 111°
x = 111
Use the formula.
Area = (1/2)*13*10*sin(72°) ≈ 61.8 units².
Answer:
the answer is 12 feet
Step-by-step explanation: