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fiasKO [112]
4 years ago
11

The average (arithmetic mean) of k scores

Mathematics
1 answer:
denis23 [38]4 years ago
6 0

Answer:

(E) (20k - 150)/(k - 10)

Step-by-step explanation:

Sum of all scores = average × number of scores = 20 × k = 20k

                   Sum of 10 scores = 15 × 10 =150

      Sum of remaining scores = 20k - 150

Number of remaining scores = k -10

Average of remaining scores = sum of remaining/no. remaining

= (20 k -150)/(k-10)

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Answer:

The correct options are;

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3) The shape maps unto itself after a rotation of 180 degrees

Step-by-step explanation:

We note that the shape of a cross which consists of two equal members (segments) bisecting each other at right angles such that when a member is placed vertically upright, the other member will be horizontal, therefore we have;

After rotation by 90 degrees, the vertical member will become horizontal and vice versa

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I really Need help solving this problem!
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Answer:

Hello,

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Step-by-step explanation:

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3 years ago
In the given picture, y/x =4 and z/x =3. Find x.
anygoal [31]

Answer:

Step-by-step explanation:

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4 years ago
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3 years ago
Pat deposited $2000,at 6% simple intrest. how long will it be before she has $2600 in her account?
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