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Cerrena [4.2K]
3 years ago
5

PLEASE HELP ! I WILL REWARD BRAINLIEST !!

Mathematics
1 answer:
Zarrin [17]3 years ago
7 0
Every fifth student = systematic
5 random students = random
used the only ones that were = voluntary
survey to different grades = stratified 
first 10 students she saw = Convenience  <span />
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Triangle sum and exterior angle theorem.
wlad13 [49]

Did two of them for you as reference for the rest.

Explanation for #1

The sum of all the angles in a triangle is 180. Simply add the given angles. Take 180 and subtract the sum of the given angles

180 - (58 + 47) = 75

Missing angle is 75

Explanation for #4

A straight angle is 180 degrees. Same thing as the first: add the given angles then take 180 and subtract it.

Then take 180 <em>again </em>and subtract the answer you got from the first step.

180 - (21 + 34) = 125

180 - 125 = 55

The missing angle is 55

5 0
3 years ago
Solve the inequality. 1/5+1/3x&gt;1/2x-1/4
natita [175]

1/5 + 1/3·x > 1/2·x - 1/4

1/3·x - 1/2·x > - 1/4 - 1/5

2/6·x - 3/6·x > - 5/20 - 4/20

- 1/6·x > - 9/20

1/6·x < 9/20

x < 54/20

x < 27/10

x < 2.7

3 0
3 years ago
PLS HELP WILL GIVE BRAINLIEST!! What is the average of these three numbers: 6.72, 8.40, 8.40
Yuki888 [10]

Answer: 7.36

Step-by-step explanation:

avg = (6.72 + 8.40 + 8.40)/3 = 23.52/3 = 7.36

5 0
2 years ago
Read 2 more answers
Use substitution to solve each system of equations<br> y=3x-7<br> 3x-y=7
N76 [4]
3x-3x=7 x=7 or 0 cause anything ×0 is 0
6 0
3 years ago
HELP PLEASE bilal was 60 1/16 in tall then he grew 3 1/8 in. Which expression should Bilal use to estimate how many inches tall
Hoochie [10]
What I would do is round. So, 60 and 1/16 would most likely be rounded to 60, and 3 1/8 would most likely be rounded to 3.
If you want to know how much he grew, then you would add.
So Im guessing that your answer is D) 60 + 3
Hope this helped :)
6 0
3 years ago
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