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Ivan
3 years ago
13

Which equation shows y=−1/2x+4 is in standard form?

Mathematics
1 answer:
adelina 88 [10]3 years ago
8 0

Answer:

B. x + 2y = 8 is your answer.

Step-by-step explanation:

So this is what you do:

y = -1/2x + 4 <u>You are going to add -1/2 to the other side.</u>

y + 1/2x = 4 <u>You are going to multiply the equation by 2.\</u>

B. x + 2y = 8 is your answer.

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Oxygen flows through one tube into a liter flask filled with air, and the mixture of oxygen and air (considered well stirred) es
yKpoI14uk [10]

The amount of oxygen in the flask through the intake tube illustrates proportions

The flask 99.35% will contain of oxygen after 5L have passed through the intake tube

<h3>How to calculate the percentage of oxygen?</h3>

To do this, we make use of the following representations

  • P for the proportion of oxygen
  • V for te volume of oxygen
  • x for the proportion of oxygen in the flask after 5 L passed through

So. we have the following derivative

dP = dV - P * dV

Divide through by dV

dP/dV  = 1 - P

Next, we set up the integral

\int\limits^x_{0.040}  \frac {1}{1 - P}dP= \int\limits^5_0 {dV}

Integrate both sides

-\ln(|P - 1|)|\limits^x_{0.04} = 5

Expand

-ln(|x - 1|) + ln(|0.04 - 1|) = 5

Evaluate the difference

-ln(|x - 1|) + ln(|-0.96|) = 5

Express as a fraction

ln(0.96/|x - 1|) = 5

Express both sides as exponents with a base of 2

e^ln(0.96/|x - 1|) = e^5

Solve for x

x = 1 - 0.96/e^5

Evaluate the difference

x = 0.9935

Express as percentage

x = 99.35%

Hence, the flask 99.35% will contain of oxygen after 5L have passed through the intake tube

Read more about proportions at:

brainly.com/question/1781657

3 0
2 years ago
Without using calculator or table find the value of sin 15°​
lubasha [3.4K]

Answer:

.25881

Step-by-step explanation:

sin15

=sin(45-30)

=sin45.cos30-cos45.sin30

=(0.707×0.86)-(0.707×0.5)

=(0.6082)-(0.3535)

=0.25

6 0
3 years ago
Which relationships describe angles 1 and 2?
NikAS [45]

Supplementary angles.

This is because supplementary angles are two angles that add up to 180 degrees, and these two angles would add up to 180 degrees.

5 0
2 years ago
What is the probability of getting dealt a hand equal to 21?
Grace [21]

Answer:

The odds to get a blackjack (natural) as arrangement: 128 / 2652 = . 0483 = 4.83%. 4.83% is equivalent to about 1 in 21 blackjack hands.

6 0
3 years ago
$12,000 is invested for 4 years at a simple interest rate of 1.5%. How much does the investment earn?
bixtya [17]
12'000×1.5 I think might need to multiple your answer by 4 yet
5 0
3 years ago
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