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2 years ago

If m _1 = 40°, then m AB =

Mathematics

1 answer:

Ymorist [56]2 years ago

4 0

Answer:

arc AB = 40°

Step-by-step explanation:

The measure of arc AB is equal to the measure of the central angle that intercepts it, then

arc AB = ∠ 1 = 40°

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An equation in slope-intercept form is ______

Amanda [17]

an equation in slope intercept form is

y=mx+b

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3 years ago

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How many times does the graph of the function below intersect touch the x-axis? y= -3x^2 + x + 4

inessss [21]

Answer:

2 times

Step-by-step explanation:

Well let's first graph the quadratic equation,

Look at the image below ↓

By looking at the image below we can tell that the graph touches the x axis 2 times at,

<em />

<em>the parabola touches the x axis twice.</em>

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<em>Hope this helps :)</em>

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3 years ago

What percentage of your gross earnings is taken by your employer for FICA?

Leno4ka [110]

Answer:

<em>well non of the answer choices are exact but i would say a/the first one. im not sure but they should add up to about 7.65%.</em>

Step-by-step explanation:

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2 years ago

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What is the vertex form of Y = x2 - 6x + 6?

ahrayia [7]

Answer:

$\large\boxed{y=(x-3)^2-3}$

Step-by-step explanation:

The vertex form of a quadratic equation <em>y = ax² + bx + c:</em>

<em>y = a(x - h)² + k</em>

(h, k) - coordinates of a vertex

We have the equation <em>y = x² - 6x + 6</em>.

Convert to the vertex form:

$y=x^2-2(x)(3)+6\\\\y=\underbrace{x^2-2(x)(3)+3^2}_{(*)}-3^2+6\qquad\text{use}\ (a-b)^2=a^2-2ab+b^2\qquad(*)\\\\y=(x-3)^2-9+6\\\\y=(x-3)^2-3\to h=3,\ k=-3$

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3 years ago

A simple random sample of 64 observations was taken from a large population. The population standard deviation is 120. The sampl

jeka94

Answer:

<h3>The standard error of the mean is <u>15</u></h3>

Step-by-step explanation:

Given that a simple random sample of 64 observations was taken from a large population.

Hence it can be written as n=64

The population standard deviation is 120.

It can be written as $\sigma_{\overline{X}}=120$

The sample mean was determined to be 320.

It can be written as $\overline{X}=\mu =320$

<h3>To find the standard error of the mean :</h3>

The formula for the standard error of the mean is given by

$\sigma_{\overline{X}}=\frac{\sigma}{\sqrt{n}}$

Now substitute the values in the formula we get

$\sigma_{\overline{X}}=\frac{120}{\sqrt{64}}$

$=\frac{120}{8}$

$=15$

$\sigma_{\overline{X}}=15$

<h3>∴ The standard error of the mean is 15</h3>

3 0

3 years ago