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2 years ago

12

For the past three months, Grace used her cell phone for 43 minutes, 62 minutes, and 57 minutes how many minutes would she have

to use her cell phone this month for the average usage over the four months to be 55 minutes

1 answer:

mina [271]2 years ago

8 0

Answer:1

Step-by-step explanation:

Her average over those three months already is 54 so she has and average on 1 min left

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2 years ago

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Leya [2.2K]

Answer:

$x =\sqrt{\frac{a^6m}{b^2}+n}$

General Formulas and Concepts:

Order of Operations: BPEMDAS
Equality Properties
Exponent Power Rule: $(b^m)^n=b^{mn}$

Step-by-step explanation:

<u>Step 1: Define equation</u>

$a\sqrt{\frac{x^2-n}{m} } =\frac{a^2}{b}$

<u>Step 2: Solve for </u><em><u>x</u></em>

Multiply <em>a</em> on both sides: $\sqrt{\frac{x^2-n}{m} } =\frac{a^3}{b}$
Square both sides: $\frac{x^2-n}{m} =(\frac{a^3}{b})^2$
Simplify: $\frac{x^2-n}{m} =\frac{a^6}{b^2}$
Multiply <em>m</em> on both sides: $x^2-n =\frac{a^6}{b^2}m$
Add <em>n</em> to both sides: $x^2 =\frac{a^6}{b^2}m+n$
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