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2 years ago

Evaluate 4(x - 3) + 5x - x^2 for x = 3 A. 2 B. -6 C. 6D. -2

Mathematics

1 answer:

ipn [44]2 years ago

3 0

Answer:

C) x=6...

Step-by-step explanation:

hope this helps...

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Alika [10]

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3 years ago

Type the expression that results from the following series of steps:

swat32

Answer:

start with y

add 7

y+7

multiply by 3

3(y+7)

subtract 6

3(y+7)-6

therefore the answer is:

3y + 21 - 6

3y + 15 or 3(y+5)

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2 years ago

what is the probability of seeing a sample mean for 21 observations less or equal to the sample mean that we observed

kramer

Answer:

$P(x \le 21) = 0.69146$

Step-by-step explanation:

The missing parameters are:

$n = 64$ --- population

$\mu = 20$ --- population mean

$\sigma = 16$ -- population standard deviation

Required

$P(x \le 21)$

First, calculate the sample standard deviation

$\sigma_x = \frac{\sigma}{\sqrt n}$

$\sigma_x = \frac{16}{\sqrt {64}}$

$\sigma_x = \frac{16}{8}$

$\sigma_x = 2$

Next, calculate the sample mean $\bar_x$

$\bar x = \mu$

So:

$\bar x = 20$

So, we have:

$\sigma_x = 2$

$\bar x = 20$

$x = 21$

Calculate the z score

$x = \frac{x - \mu}{\sigma}$

$x = \frac{21 - 20}{2}$

$x = \frac{1}{2}$

$x = 0.50$

So, we have:

$P(x \le 21) = P(z \le 0.50)$

From the z table

$P(z \le 0.50) = 0.69146$

So:

$P(x \le 21) = 0.69146$

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2 years ago

Can anyone help me with inverse function please?

12345 [234]

${h}^{ - 1} oh(x) = x \\ {h}^{ - 1} (4x + m) = x \\ 2k(4x + m) + \frac{5}{8} = x \\ 8kx + 2km + \frac{5}{8} = x$

k and m must satisfy 8k = 1 mean k = ⅛

and 2km+⅝=0 mean m = -5/2

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3 years ago

What is the measure of angle A???

Dmitriy789 [7]

Answer:

41.5

180-14=166/4=41.5

5 0

3 years ago

Evaluate 4(x - 3) + 5x - x^2 for x = 3 A. 2 B. -6 C. 6D. -2​

Evaluate 4(x - 3) + 5x - x^2 for x = 3 A. 2 B. -6 C. 6D. -2