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frosja888 [35]
3 years ago
15

Paul and his friends average their test grades and find that the average is 95.The teacher announces that the average grade of a

ll her classes is 83.Why are the averages so different
Mathematics
2 answers:
lara31 [8.8K]3 years ago
6 0
The averages did not match because of the number of grades calculated into the total average.  Let's say for example that the teacher in this case has 25 students in her class.  She would take the average of all 25 students' test grades.  Let's say that Paul has 4 friends with whom he averaged his test grade.  He has taken the average of 5 tests, whereas the teacher has calculated the total amount of student test scores (25).  Paul and his friends may have done better on that particular test than the other 20 students in the class, explaining the average of 95 that he got.  Other students who got B's or C's on that test pulled the total class average down, explaining the teacher's average of 83.    
Oduvanchick [21]3 years ago
3 0

Answer:

The other students in their class could have had a bad grade resulting the class average to go down

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TRI has vertices T(-3, 4), R(3, 4), and I(0,0). Is TRI scalene, isosceles, or equilateral?
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Answer:

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Step-by-step explanation:

Graph your triangle!

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Hope this helps!


4 0
3 years ago
Find sin A for the triangle below. Give the exact value as an expression and an approximation to the nearest ten-thousandth. Not
Feliz [49]

the exact value of sin A  to the nearest ten- thousandth is 0. 6625

<h3>Using the pythagorean theorem</h3>

a² + b² = c²

The opposite side is unknown, so use the pythagorean theorem to find it

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Substitute into the formula

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To find Sin A, use

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7 0
2 years ago
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8 0
3 years ago
Read 2 more answers
What else would need to be congruent to show that abc = xyz by asa
pochemuha
Since you're working with the ASA postulate, you're looking to show congruence of the angles at either end of a side. You're given side AC and angle A as congruent with their counterparts. Obviously, you also need to show congruence of angle C with its counterpart, angle Z.

selection B is appropriate
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Then we set each binomial equal to ZERO.

7 0
3 years ago
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