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Oksi-84 [34.3K]

3 years ago

6

What are some prime numbers?

2 answers:

34kurt3 years ago

8 0

2, 3, 5, 7, 11, 13; basically any number that has only two factors, one and itself.

pshichka [43]3 years ago

5 0

Answer:

2,3,5,7,11

Step-by-step explanation:

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Solution of this system of equations. (Write it as a point)

Nutka1998 [239]

(1,5) I think, because that’s where the points intersect

8 0

3 years ago

The weekly salaries of teachers in one state are normally distributed with a mean of $490 and a standard deviation of $45. what

Juliette [100K]

The probability is 0.2177.

The z-score associated with this income is

z = (525-490)/45 = 0.78

Using a z-table (http://www.z-table.com) we see that the area to the left of this score, less than the score, is 0.7823. We want the probability greater than this score, so we subtract from 1:
1 - 0.7823 = 0.2177.

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3 years ago

What is the magnification formula?

romanna [79]

Answer:

It is option A

Step-by-step explanation:

And the "suck it" guy is a loser :)

3 0

3 years ago

Nirmala graphed the relationship between the duration (in hours) of using an oil lamp and the volume (in milliliters) of oil rem

mariarad [96]

Answer:

Nirmala can use the lamp for 31.66 hours before it runs out of oil.

Step-by-step explanation:

From the graph,

Take any two points, let say

(15, 25)

(25, 10)

$\mathrm{Slope\:between\:two\:points}:\quad \mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}$

$\left(x_1,\:y_1\right)=\left(15,\:25\right),\:\left(x_2,\:y_2\right)=\left(25,\:10\right)$

$m=\frac{10-25}{25-15}$

$m=-\frac{3}{2}$

The equation of line in slope-intercept form

$y = mx + b$

Putting $m=-\frac{3}{2}$ and any point, let say (25, 10), to find the y-intercept 'b'

$10=-\frac{3}{2}\left(25\right)+b$

$-\frac{3}{2}\left(25\right)+b=10$

$-\frac{75}{2}+b=10$

$\mathrm{Add\:}\frac{75}{2}\mathrm{\:to\:both\:sides}$

$-\frac{75}{2}+b+\frac{75}{2}=10+\frac{75}{2}$

$b=\frac{95}{2}$

$b=47.5$

So the equation of line will be:

$y = mx + b$

$y=-\frac{3}{2}x+47.5$

In order to find how long Nirmala can use the lamp before it runs out of oil, we need to find x-intercept which can be obtained by putting y = 0, and solve for x, as duration lies on x-axis.

so

$y=-\frac{3}{2}x+47.5$

Putting y = 0

$0=-\frac{3}{2}x+47.5$

$-\frac{3}{2}x+47.5=0$

$-\frac{3}{2}x=-47.5$

$\mathrm{Multiply\:both\:sides\:by\:}2$

$2\left(-\frac{3}{2}x\right)=2\left(-47.5\right)$

$-3x=-95$

$\mathrm{Divide\:both\:sides\:by\:}-3$

$\frac{-3x}{-3}=\frac{-95}{-3}$

$x=\frac{95}{3}$

$x=31.66$

Therefore, Nirmala can use the lamp for 31.66 hours before it runs out of oil.

4 0

3 years ago

Read 2 more answers

Find the polynomial that represents this figure:

Snezhnost [94]

Multiply the lengths of the sides.
x(x + 3)
x^2 + 3x

4 0

3 years ago