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n200080 [17]
3 years ago
8

Evaluate 3a2 + 4b2 for a = 2 and b = 3

Mathematics
1 answer:
Crank3 years ago
4 0
<span>3a^2 + 4b^2 for a = 2 and b = 3

</span><span>3(2)^2 + 4(3)^2 = 12 + 36 = 48</span>
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The average mark of candidates in an aptitude test was 128.5 with a standard deviation of 8.2.Three scores extracted from the te
Luba_88 [7]

Answer:

102

Step-by-step explanation:

We have the mean (m) 128.5 and the standard deviation (sd) 8.2, we must calculate the value of z for each one and determine whether or not it is an outlier:

z = (x - m) / sd

In the first case x = 148:

z = (148 - 128.5) /8.2

z = 2.37

In the second case x = 102:

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In the first case x = 152:

z = (152 - 128.5) /8.2

z = 2.86

The value of this is usually between -3 and 3, therefore when x is 102 it goes outside the range of the value of z, which means that this is the outlier.

3 0
3 years ago
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Answer:

x = -3

Step-by-step explanation:

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3 0
3 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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3 years ago
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