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marysya [2.9K]
4 years ago
7

At the karate school, Class A has 8 students with an average age of 6 years. Class B has 12 students with an average age of 9 ye

ars. The classes combine for a group workout.
What is the average age of the combined classes?

Enter your answer as a decimal in the box.
Mathematics
2 answers:
Murrr4er [49]4 years ago
7 0

Answer: I took the test and the answer is 7.8

Good luck!

ELEN [110]4 years ago
3 0
IT IS 7.8 AND I  KNOW IT IS RIGHT
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The graph of f(x) = x^2 has been shifted into the form f(x) = (x − h)^2 + k
stepan [7]
\bf \qquad \qquad \qquad \qquad \textit{function transformations}
\\ \quad \\\\
% left side templates
\begin{array}{llll}
f(x)=&{{  A}}({{  B}}x+{{  C}})+{{  D}}
\\ \quad \\
y=&{{  A}}({{  B}}x+{{  C}})+{{  D}}
\\ \quad \\
f(x)=&{{  A}}\sqrt{{{  B}}x+{{  C}}}+{{  D}}
\\ \quad \\
f(x)=&{{  A}}(\mathbb{R})^{{{  B}}x+{{  C}}}+{{  D}}
\\ \quad \\
f(x)=&{{  A}} sin\left({{ B }}x+{{  C}}  \right)+{{  D}}
\end{array}\\\\
--------------------\\\\

\bf \bullet \textit{ stretches or shrinks horizontally by  } {{  A}}\cdot {{  B}}\\\\
\bullet \textit{ flips it upside-down if }{{  A}}\textit{ is negative}\\
\left. \qquad   \right.  \textit{reflection over the x-axis}
\\\\
\bullet \textit{ flips it sideways if }{{  B}}\textit{ is negative}\\
\left. \qquad   \right.  \textit{reflection over the y-axis}

\bf \bullet \textit{ horizontal shift by }\frac{{{  C}}}{{{  B}}}\\
\left. \qquad  \right. if\ \frac{{{  C}}}{{{  B}}}\textit{ is negative, to the right}\\\\
\left. \qquad  \right.  if\ \frac{{{  C}}}{{{  B}}}\textit{ is positive, to the left}\\\\
\bullet \textit{ vertical shift by }{{  D}}\\
\left. \qquad  \right. if\ {{  D}}\textit{ is negative, downwards}\\\\
\left. \qquad  \right. if\ {{  D}}\textit{ is positive, upwards}\\\\
\bullet \textit{ period of }\frac{2\pi }{{{  B}}}

with that template in mind, let's see, it went to the right 2 units, and then up 3 units.

that simply means, C = -2, D = 3.
8 0
3 years ago
Help me find the answer please.
sweet-ann [11.9K]

Answer:

A = 33 1/3 ft²

It's the one you picked lol

4 0
2 years ago
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ValentinkaMS [17]

Answer:

y = -2x + 4

Step-by-step explanation:

The line intercepts at the y axis at 4. And you go to units down then one unit right to get to the next point.

6 0
3 years ago
What is the answer to this equation 6x+3-6x=3
aev [14]

Answer:

0=0

Step-by-step explanation:

6x-6x=0

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this statement is correct

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Answer:

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3 years ago
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