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jok3333 [9.3K]
3 years ago
5

Six students all took the same test. Their scores were 70,71,75,75,88, and 89. What is the mean absolute deviation for the test

scores?
A)7
B)7.5
C)75
D)78
Mathematics
1 answer:
ki77a [65]3 years ago
5 0

Answer:D)78

Step-by-step explanation:70+71+75+75+88+89/6

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Lisa wants to use her calculator to square a two-digit positive integer, but she accidentally enters the tens digit incorrectly.
Svetradugi [14.3K]

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Step-by-step explanation:

Let

x= tens digit (wrong one)

and y= zeroes digit

and z= tens digit (right one)

Now according to the statement,

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Simplifying this we get

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So it could either be

x-z=1 or x-z=3

If we take the x-z=1

then 5x+y+5z=117

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This leaves us with x-z=3

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Check

54²-24²= 2340 so it is correct.

7 0
3 years ago
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