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anygoal [31]
2 years ago
14

A teacher is comparing the quarter grades between two of her classes. She takes a random sample of 8 students from each class an

d lists the grades as shown. Find the mean for Class A.
Class A: 80, 83, 74, 91, 76, 87, 93, 72
Class B: 90, 75, 82, 86, 73, 85, 79, 94
Mathematics
1 answer:
Alja [10]2 years ago
8 0
The mean for class A is 82
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Step-by-step explanation:

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4 0
3 years ago
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Crank

Answer:

The correct answer is option D. 69°

Step-by-step explanation:

Points to remember

1). The sum of angles in a linear pair is 180°

2). In a triangle sum of two angles are equal to the exterior angle of third angle

From the figure we can see a triangle in which two exterior angles area given.

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from figure we get,

n = (interior angle of 131°  + interior angle of 160°)

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Rashid [163]

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anastassius [24]

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Alright, so by using the "keep me, change me, turn me over" method - we can easily solve this:

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