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4 years ago

Your electric bill has been as follows for the past six months:

2 answers:

vladimir1956 [14]4 years ago

5 0

To find the monthly average (mean), add all the numbers up and divide the answer by the total number of numbers you added up.

July: $78.56

August: $30.21

September: $81.20

October: $79.08

November: $66.18

December: $100.75

Add all the bills up.

$78.56 +

$30.21 +

$81.20 +

$79.08 +

$66.18 +

$100.75 =

$435.98

Divide $435.98 by 6 (because you added up 6 numbers).

$435.98 ÷ 6 = $72.66

$\boxed {D)~72.66~is~your~answer.}$

kakasveta [241]4 years ago

4 0

You want to find the monthly average over the past 6 months.

July: $78.56

August: $30.21

September: $81.20

October: $79.08

November: $66.18

December: $100.75

Add all of these up

(July) $78.56

(August) $30.21

(September) $81.20

(October) $79.08

(November) $66.18

(December) + $100.75

----------------------------------------------

(Total cost) $435.88

There are 6 months you are calculating for, therefore divide the total (combined) cost of 6 months with the total number of months (in this case, 6)

$435.88 (total cost of 6 months) ÷ 6 (months)

The average cost per month of over the past 6 months is $72.66.

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Step-by-step explanation:

To multiply powers of a variable, add the exponents:

$x^m\cdot x^n = x^{m+n}$

This rule works for all exponents, positive, negative, or zero. Also, remember that $x^0=1$ .

Also, remember the definition of negative exponent: $x^{-n} = \frac{1}{x^n}$

To multiply the two monomials, start by multiplying the coefficients, 14 and 4. That gives 56, so your answer begins with 56.

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For the powers of y, $(y^{-4})(y^4)=y^{4+(-4)} = y^0 = 1$ $(y^{-4})(y^4) = y^{-4+4} = y^0 =1$

Your answer is

$56 \cdot \frac{1}{x^2} \cdot 1 =\frac{56}{x^2}$

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WITCHER [35]

Answer:

$\huge\boxed{\sf x = 1.8}$

Step-by-step explanation:

$\sf 2x-1.5 = 2.1\\\\Add \ 1.5 \ to \ both \ sides\\\\2x = 2.1 + 1.5\\\\2x = 3.6\\\\Divide \ 2 \ to \ both \ sides\\\\x = 3.6 / 2\\\\x = 1.8\\\\\rule[225]{225}{2}$

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