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jolli1 [7]
3 years ago
15

In her seventh grade pre-algebra class, Ms. Cornelius gave a standardized exam prepared by the district math department. Student

s' scores on the exam were as follows:
100, 98, 98, 96, 96, 96, 94, 92, 88, 82.
What is the mean score?
Mathematics
1 answer:
Alik [6]3 years ago
3 0

Answer: 94

Step-by-step explanation:

The mean is the average of the numbers,

To find the mean add all the numbers and divide by how many numbers there are i.e count the numbers

In this case lets find the sum;

Sum = 100 + 98 + 98 +96 + 96 + 96 + 94 + 92 + 88 + 82

       = 940

Count the numbers : There are 10 numbers in total.

Therefore, The mean = 940/10

                                    = 94

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Let P(x) = 3x³-ax+b. If P(1) = P(-1) and P(2)=16, find the values of a and b
kozerog [31]

P(1) = P(-1)

P(1) = 3 - a + b
P(-1) = -3 + a + b

-> 3 - a + b = -3 + a + b
-> 3 - a + b + 3 - a - b = 0
-> 6 - 2a = 0
-> a = 3.

P(2) = 24 - 2a + b -> 24 - (2a - b) = 16 -> 2a - b = 8
-> 6 - b = 8
b = -2.

So, a = 3 and b = -2

Recheck : P(1) = 3 - 3 + (-2) = -2
P(-1) = -3 + 3 + (-2) = -2 => P(1) = P(-1) (true)

P(2) = 24 - 6 + (-2) = 16.

6 0
2 years ago
What is the answer please?
docker41 [41]

Answer: D (bottom option)

Not Congruent

Step-by-step explanation:

Assuming the trapezoids are to scale, they are not the same shape. This means that they could not be congruent even if they were centered on top of each other.

3 0
2 years ago
PLS I NEED HELP NOW PRONTO!!!!!
weeeeeb [17]

Answer:

The mean for Stem is 2.5

The mean for Leaf is 81.25

8 0
2 years ago
suppose you have 192 marbles in groups of 15 marbles each. Find the number of groups of marbles that you have. Write the quotien
stepan [7]
So if you have 192 marbles and you want to group them in groups of 15 marbles each
you would see how many times 15's there are in 192 or how many 192's would go into 15

so 192/15 or 
12 and 12/15
8 0
3 years ago
Read 2 more answers
Simplify the following expression.<br><br>10|3 - 7| + 24<br><br>​
weeeeeb [17]

Answer:

0

Step-by-step explanation:

The answer is 0 due to using PEMDAS

5 0
3 years ago
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