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3 years ago

What is the geometric mean of 2/5 and 490

Mathematics

1 answer:

natta225 [31]3 years ago

8 0

Answer:

Step-by-step explanation:

Geometric mean = nth root (product of individual values of set of data)

from the question, n=2,

product of individual values of set of data= 2/5*490 = 196

Therefore Sqrt (196) =14

NB: As n is 2, we use sqrt, if n is 3, we use cube root and so on

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3 years ago

Combine likes terms to create an equivalent expression 1/7 - 3(3/7h -2/7)

Anastasy [175]

$\frac{1}{7} -3(\frac{3}{7}h -\frac{2}{7}) = \frac{7-9h}{7}$

Solution:

Given expression is:

$\frac{1}{7} -3(\frac{3}{7}h -\frac{2}{7})$

We have to combine the like terms

From given expression,

$\frac{1}{7} -3(\frac{3}{7}h -\frac{2}{7})$

By distributive property,

The distributive property lets you multiply a sum by multiplying each addend separately and then add the products.

a(b + c) = ab + bc

Therefore,

Solve for brackets using distributive property

$\frac{1}{7} - (3 \times \frac{3}{7}h) + (3 \times \frac{2}{7})\\\\\frac{1}{7} - \frac{9h}{7} + \frac{6}{7}$

Add 1/7 and 6/7

$\frac{1}{7} + \frac{6}{7} -\frac{9h}{7}\\\\\frac{1+6}{7} -\frac{9h}{7}\\\\Simplify\\\\\frac{7}{7}-\frac{9h}{7}\\\\1-\frac{9h}{7}\\\\Simplify\\\\\frac{7-9h}{7}$

Thus the equivalent expression is found

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2 years ago

(-3+-2^2) + -(4*2) / 2

ozzi

Answer:

-3

Step-by-step explanation:

2^2 = 4

4 + (-3) = 1

4*2 = 8

8 * -1 = -8

-8 / 2 = -4

1 + -4 = -3

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3 years ago

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