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2 years ago

which of the following is the quotient of the rational expressions shown below 2x-1/x+1 divided by 3x^2/x^2+x

2 answers:

8 0

To divide fractions invert the divisor and multiply so here we have:-

2x - 1 x^2 + x
------ * ----------
x + 1 3x^2

= 2x - 1 * x(x + 1)
------- ----------
x + 1 3x^2

= x(2x - 1) / 3x^2 = (2x - 1) / 3x

BabaBlast [244]2 years ago

3 0

Answer:

APEX

$\frac{2x-1}{3x}$

Step-by-step explanation:

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A triangle has an area of 40 square inches. It's base is written as (x + 2) and it's height is written as (x + 4). Calculate the

olga2289 [7]

-3 plus or minus square root of 41
See attached picture for explanation

7 0

2 years ago

A veterinarian's office recorded one particular week that they had 50 patients. The following table shows the recorded number of

Gre4nikov [31]

Answer:

1. The correct answer is 46%

2. The correct answer is .07

3. The correct answer is (34%,58%)

4. The correct answer is (32%,60%)

Step-by-step explanation:

1. Let's calculate the percentage or proportion of patients that were dogs:

p = (7 + 4 + 5 + 5 + 2)/50 = 23/50 = 0.46

The correct answer is 46%

2. Let's estimate the standard error, using the given formula, this way:

S.e = √ (0.46 * 0.54)/50 = √0.049 = 0.07

The correct answer is .07

3. Let's calculate the confidence limits of the 90% confidence interval, this way:

Confidence limits = proportion +/- 1.645 * standard error

Confidence limits = 0.46 +/- 1.645 * 0.07

Confidence limits = 0.46 +/- 0.12

Confidence limits = 0.34, 0.58

The correct answer is (34%,58%)

4. Let's calculate the confidence limits of the 95% confidence interval, this way:

Confidence limits = proportion +/- 1.96 * standard error

Confidence limits = 0.46 +/- 1.96 * 0.07

Confidence limits = 0.46 +/- 0.14

Confidence limits = 0.32, 0.60

The correct answer is (32%,60%)

3 0

2 years ago

What is the sum of the geometric series? –122 –2 40 54

Nady [450]

The answer is C) 40
You would find this answer by using a formula.

5 0

2 years ago

Read 2 more answers

Solve 4kx+10kx=7 for x

enot [183]

Answer: x= 1/2k

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

Hope this helps!

4 0

2 years ago

Read 2 more answers

HELP PLS>>> The vector (3, - 7) ) is rotated by an angle of (3pi)/4 radians and then reflected across the y-axis. If th

horsena [70]

Answer:

$a \approx -2.826$ , $b \approx 7.072$

Step-by-step explanation:

First, the vector must be transformed into its polar form:

$r = \sqrt{3^{2}+ (-7)^{2}}$

$r \approx 7.616$

$\theta \approx 2\pi - \tan^{-1}\left(\frac{7}{3} \right)$

$\theta \approx 1.629\pi$

Let assume that vector is rotated counterclockwise. The new angle is:

$\theta' = \theta + \frac{3\pi}{4}$

$\theta' = 2.379\pi$

Which is coterminal with $\theta'' = 0.379\pi$ . The reflection across y-axis is:

$\theta''' = \pi - \theta''$

$\theta''' = 0.621\pi$

The equivalent vector in rectangular coordinates is:

$a = 7.616\cdot \cos 0.621\pi$

$a \approx -2.826$

$b = 7.616\cdot \sin 0.621\pi$

$b \approx 7.072$

7 0

2 years ago