4, 4, 6, 7, 9, 9, 9, 10, 14, 17, 21
Mean:

Median:

Mode:

Range:

hmmm

Mean: 99

Median: 9

Mode: 9

Range: 17

Step-by-step explanation:

Mean is adding all the numbers together then subtracting by the number of numbers you added:

4 + 4 + 6 + 7 + 9 + 9 + 9 + 10 + 14 + 17 + 21 = 110

110 - 11 = 99

Median is the middle number: 9

The number that appears the most often is the mode: 9

The range is the difference between the lowest and highest number:

21 - 4 = 17

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true

60.9774

step-by-step explanation:

because when you add 47.6 plus 7.32 equals 54.92

and when you add .0574 + 6= 6.0574

and when you add 54.92 and 6.0574 you get the answer of 60.9774.

plzz mark brainlest last one got deleted. cause i didn't explain it but i did but i understand what the mod meant