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2 years ago

15

What is the geometric mean of 8 and 10?

2 answers:

Levart [38]2 years ago

8 0

Answer:

Geometric mean of 2 numbers is a square root of the product.

Given 8,10

Geometric mean = √(8*10)

=√80

= √(16*5)

= 4√5

nekit [7.7K]2 years ago

3 0

If the smaller number is x, then the larger number has to be 20 - x in order for the arithmetic mean to be 10, as their sum must be 20.

If the geometric mean is 8 the product of the numbers has to be 64 and so the larger number is 64/x

Solving 64/x = 20 - x gives the quadratic x^2 -20x +64 = 0 so x = 4 or 16.

The two numbers are 4 and 16.

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Yesterday's price of notebook = $3.45

Today's price of notebook = $3.20

We have to determine the percentage decrease in the cost of notebook.

Percentage decrease = (Decrease $\div$ Old price) $\times 100$

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2 years ago

A square and a triangle have equal perimeters. The square has a perimeter of 4(x + 9), and the triangle has a perimeter of 3(x +

cricket20 [7]

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2 years ago

Area and perimeter of geometric functions

SCORPION-xisa [38]

Answer:

C. 60

Step-by-step explanation:

From triangle ADB,

$|AD|^2+|BD|^2=|AB|^2$

$|AD|^2+16^2=20^2$

$|AD|^2=20^2-16^2$

$|AD|^2=400-256$

$|AD|^2=144$

$|AD|=\sqrt{144}$

$|AD|=12$

From triangle ADC,

$|CD|^2+12^2=15^2$

$|CD|^2+144=225$

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$|CD|^2=81$

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The perimeter

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3 years ago

Read 2 more answers

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Zigmanuir [339]

First, you multiply 4 by 1. Then that's your answer, 4. I hope it helped!

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