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Alexxx [7]
3 years ago
7

3 – (–3) 7 – 4 = a. 14 b. 9 c. 12 d. 2

Mathematics
1 answer:
VLD [36.1K]3 years ago
6 0
B. 9

3+3+7-4
6+7-4
= 9

The answer is B.
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Solve as a difference equation.
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Solution :

Let y = amount of caffeine at a given time in body.

n = number of hours

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$\Rightarrow \frac{dY}{Y}=- 0.01 \ dn

ln Y = -0.01 n + C

At n = 0, Y = 130 mg

ln 130 = -0.01 x 0 + C

C = ln 130

$ \ln \frac{Y}{130} =- 0.01 \ n$

$Y = 130 \ e^{-0.01n}$

When Y = 65

$65 = 130 \ e^{-0.01 n }$

$\frac{65}{130}=e^{-0.01n}$

$\ln \frac{1}{2} = -0.01 \ n$

n = 69.315 hours

At n = 24 hours

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3 years ago
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C- 127
D-  54
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F-  59
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3 years ago
We want to solve the following system using the Gauss-Jordan (i.e., Elementary Row
Dennis_Churaev [7]

Answer:

<em>(</em><em> </em><em>2</em><em> </em><em>,</em><em>-1</em><em> </em><em>,</em><em>3</em><em>)</em>

Step-by-step explanation:

<em>x-</em><em>2</em><em>y</em><em> </em><em>+</em><em> </em><em>z</em><em> </em><em>=</em><em> </em><em>7</em>

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<em>2</em><em>x-</em><em> </em><em>2</em><em>y</em><em> </em><em>+</em><em>z</em><em> </em><em>=</em><em>3</em>

<em>WILL</em><em> </em><em>YOU MARK</em><em> </em><em>ME BRAINLIEST</em><em> </em>

4 0
3 years ago
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Submit teFor the experiment of drawing a single card from a standard 52-card deck, find (a) the probability, and (b) the odds in
Studentka2010 [4]

QUESTION A

The probability of an event is calculated using the formula:

P(E)=\frac{Number\text{ }of\text{ }favorable\text{ }outcomes}{Number\text{ }of\text{ }possible\text{ }outcomes}

There are 4 nines in a standard deck of cards. Therefore, there are 48 cards that are not nines.

Since there are 52 cards, the probability is calculated to be:

\begin{gathered} P=\frac{48}{52} \\ P=\frac{12}{13} \end{gathered}

The probability is 12/13.

QUESTION B

Odds in favor of a particular event are given by the number of favorable outcomes to the number of unfavorable outcomes. The formula is written out to be:

P(E)=\frac{Number\text{ }of\text{ }favorable\text{ }outcomes}{Number\text{ }of\text{ }unfavorable\text{ }outcomes}

Since we have that the number of favorable outcomes is 48 and the number of unfavorable outcomes is 4, we have that the odds in favor are given to be:

P=\frac{48}{4}=\frac{12}{1}

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3 years ago
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