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agasfer [191]
3 years ago
15

Please solve!! 4 (x-6) + 10 = 6

Mathematics
2 answers:
Gala2k [10]3 years ago
6 0

\huge\text{Hey there!}

\textsf{4(x - 6) + 10 = 6}

\textsf{Distribute}

\textsf{4(x) + 4(-6) + 10 = 6}

\textsf{4x - 24 + 10 = 6}

\textsf{COMBINE the LIKE TERMS}

\textsf{(4x) + (-24 + 10) = 6}

\textsf{-24 + 10 = -14}

\textsf{4x - 14 = 6}

\textsf{ADD 14 from BOTH SIDES}

\textsf{4x - 14 + 14 = 6 + 14}

\textsf{CANCEL out: -14 + 14 because that gives you 0}

\textsf{KEEP: 6 + 14 because that helps us solve for x}

\underline{\textsf{6 + 14 = 20}}

\textsf{New equation: 4x = 20}

\textsf{DIVIDE 4 from BOTH SIDES}

\mathsf{\dfrac{4x}{4}=\dfrac{20}{4}}

\textsf{CANCEL out}: \mathsf{\dfrac{4}{4}}  \textsf{because that gives you 1}

\textsf{KEEP}: \mathsf{\dfrac{20}{4}}  \textsf{because that solves and gives you x}

\mathsf{TEMPORARY\ EQUATION: x = \dfrac{20}{4}}

\mathsf{\dfrac{20}{5}=5}\\\\\\\mathsf{20\div4 = 5}\\\\\\\textsf{\bf x = 5}\large\checkmark

\boxed{\boxed{\large\textsf{Answer: \underline{\bf x = 5}}}}\huge\checkmark

\large\text{Good luck on your assignment and enjoy your day!}

~\frak{Amphitrite1040:)}

zheka24 [161]3 years ago
3 0
4(x-6)+10=6. 4(x-6)=-4. x-6=-1. x=5
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Maureen earned some money doing odd jobs last summer and put it in a savings account that earns 9% interest compounded quarterly
ivolga24 [154]

Answer:

Maureen earned $123.19 doing odd jobs

Step-by-step explanation:

The compound interest formula is given by:

A(t) = P(1 + \frac{r}{n})^{nt}

Where A(t) is the amount of money after t years, P is the principal(the initial sum of money), r is the interest rate(as a decimal value), n is the number of times that interest is compounded per unit year and t is the time in years for which the money is invested or borrowed.

In this question:

Compounded quarterly means that n = 4

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There is $300.00 in the account, which means that A = 300

How much did Maureen earn doing odd jobs?

This is P.

A(t) = P(1 + \frac{r}{n})^{nt}

300 = P(1 + \frac{0.09}{4})^{4*10}

(1.0225)^{40}P = 300

P = \frac{300}{(1.0225)^{40}}

P = 123.19

Maureen earned $123.19 doing odd jobs

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Whenever you face the problem that deals with maxima or minima you should keep in mind that minima/maxima of a function is always a point where it's derivative is equal to zero.
To solve your problem we first need to find an equation of net benefits. Net benefits are expressed as a difference between total benefits and total cost. We can denote this function with B(y).

B(y)=b-c
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Now that we have a net benefits function we need find it's derivate with respect to y.

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Now we must find at which point this function is equal to zero.

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Now that we know at which point our function reaches maxima we just plug that number back into our equation for net benefits and we get our answer.

B(2.8)=100(2.8)-18(2.8)²=138.88≈139.

One thing that always helps is to have your function graphed. It will give you a good insight into how your function behaves and allow you to identify minima/maxima points.


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