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Sonbull [250]
3 years ago
6

John's test grades are 69, 86, 100, and 105. What is his average?

Mathematics
2 answers:
Lunna [17]3 years ago
8 0
The answer is 90. you add them all up and divide it by 4
daser333 [38]3 years ago
8 0

Answer: John’s average test score is 90.

Step-by-step explanation:

To find the average of a set of numbers, we must find the sum of all of the numbers (add them together) and then divide by the amount of numbers in the set. In this case, we begin by finding the sum of the four numbers:

69 + 86 + 100 + 105

= 360

Then, we divide by 4, since there are 4 scores in the data set.

360/4 = 90

Therefore, John’s average test score is 90.

Hope this helps!

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A triangle has side lengths x, 10, and 7. What are the possible values of x?
rewona [7]

Answer:

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Step-by-step explanation:

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x^2+49=100

x^2=51

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7 0
3 years ago
Kirk's average driving speed is 7 kilometers per hour faster than Thor's. In the same length of time it takes Kirk to drive 450
alexandr402 [8]

Answer:

x = 816 kilometers per hour.

Step-by-step explanation:

Given the following data;

Distance traveled by Kirk = 450km

Distance traveled by Thor = 408 km

Let the average driving speed of Thor be x.

Translating the word problem into an algebraic equation;

k = x + 6

We know that the time taken to cover a distance by an object with speed is given by the formula;

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Cross-multiplying, we have;

408*(x + 6) = 405*x

408x + 2448 = 405x

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3 0
3 years ago
This is 10 points please help.. urgent
Tema [17]

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Step-by-step explanation:

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