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rosijanka [135]
3 years ago
7

___% of 40 = 4 Please help this answer is timed!!!

Mathematics
2 answers:
Goshia [24]3 years ago
4 0

Answer:

10%

Step-by-step explanation:

To find this we make a fraction and multiply by 100%

4/40 *100% = 1/10 *100% = 10%

<em>I hope this helps! :)</em>

Sedbober [7]3 years ago
4 0
10percent is your answer.
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The variable r is directly proportional to the square of t, and r = 144 when t = 72.
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Answer:

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Step-by-step explanation:

r \alpha  {t }^{2}  \\ r = k {t}^{2}  \\ 144 = k \times  {72 }^{2}  \\ k =   \frac{144}{ {72 }^{2} }   \\ k = 0.023 \\ the \: eqn \: is \: therefore \\ r = 0.023 \times  {t}^{2}

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3 years ago
What is the inverse of f(x) = -5x-4
elena55 [62]

Answer:

\displaystyle f^{-1}(x) = -\frac{1}{5}x - \frac{4}{5}.

Step-by-step explanation:

The question has provided an expression for the function f(x) and is asking for its inverse, f^{-1}(x).

Based on the definition of inverse functions,

f(f^{-1}(x)) = x.

Let y = f^{-1}(x).

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-5y = x +4.

\displaystyle y = (-\frac{1}{5})\cdot (x + 4) = -\frac{x}{5} -\frac{4}{5}.

However, f^{-1}(x)=y As a result,

\displaystyle f^{-1}(x) = -\frac{x}{5} -\frac{4}{5}.

8 0
3 years ago
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