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2 years ago

1. George joins a gym. He pays $25 to sign up and then $15 per month.

Mathematics

2 answers:

DIA [1.3K]2 years ago

7 0

Answer:

100 dollars

Step-by-step explanation:

First you multiply how much it is each month by how many months.

5x15=75

Then you add the money he has to pay to sign up. So,

75+25=100

Zigmanuir [339]2 years ago

5 0

Answer:

I believe the answer would be $100

Step-by-step explanation:

1. He already payed the $25 so he doesn't need to pay that anymore

2. If he's paying $15 a month you would have to multiply 15 by 5 because he went for 5 months

3. for the five months he payed $75, so after that you would have to add the additional $25 to the $75 get the answer of $100

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kobusy [5.1K]

So, the first brand has 9% vinegar, and say we use "x" amount of it, then, the amount of vinegar in "x" is 9% of x, or (9/100) * x, 0.09x.

the second brand has 14% of vinegar, and if we use say "y" amount of it, then the amount of vinegar in "y" is really just 14% of "y" or, (14/100) * y, 0.14y.

$\bf \begin{array}{lccclll}
&\stackrel{mL}{amount}&\stackrel{\%}{concentration}&\stackrel{amount}{concentration}\\
&------&------&------\\
\textit{first brand}&x&0.09&0.09x\\
\textit{second brand}&y&0.14&0.14y\\
------&------&------&------\\
mixture&230&0.13&29.9
\end{array}$

so, whatever "x" and "y" are, we know that x + y = 230.

and we also know that their concentration amounts will also add up, 0.09x + 0.14y = 29.9.

$\bf \begin{cases}
x+y=230\implies \boxed{y}=230-x\\
0.09x+0.14y=29.9\\
----------\\
0.09x+0.14\left(\boxed{230-x} \right)=29.9
\end{cases}
\\\\\\
0.09x+32.2-0.14x=29.9\implies -0.05x=-2.3\implies x=\cfrac{-2.3}{-0.05}
\\\\\\
x=46$

how many milliliters will it be for the second brand? well, y = 230 - x.

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AVprozaik [17]

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prisoha [69]

This problem is accompanied by a figure.

You can infere these relationships from the figure

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2 years ago

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son4ous [18]

Answer:

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Step-by-step explanation:

Given

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Hence,

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