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irakobra [83]
3 years ago
7

Which is the equation of a line thag passes through the points (1,-1) and (3,-5)

Mathematics
1 answer:
maks197457 [2]3 years ago
5 0

The question is incomplete other wise it is really easy to solve if you now how to make the line of equation. As we know the formula to calculate the line of equation is y - y1 = m (x - x1)

Where m is the slope. y1 is the first y co ordinate. x1 is the first x co ordinate.

And the formula for slope is as we know is m = y2 - y1 divided by x2 - x1.

Where m is the slope. y2 is the second y co ordinate. y1 is the first y co ordinate. x2 is the second x co ordinate. x1 is the first x co ordinate.

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The following table shows the probability of rolling the numbers 1 through 7
Marysya12 [62]

Answer:

2.0

Step-by-step explanation:

Couldn't really understnd what you wrote but I'll assume it's the standard deviation of a fair, 7-sided die

The standard deviation is just the square root of the variance (which is just the second moment minus the first moment squared)

The first moment (AKA the average is..)

\frac{1+2+3+4+5+6+7}{7}=4

The second moment is..

\frac{1^2+2^2+3^2+4^2+5^2+6^2+7^2}{7}=20

\sqrt{20-4^2}=2

4 0
3 years ago
. Al's Omelets Al's House of Eggs N'at makes omelets. Al begins each day with 150 eggs to make his famous Bestern Western Omelet
Dvinal [7]

At the beggin there are 150 eggs, after making 1 omeltet, there are 144 eggs, after the second omelet, there are 138 eggs, etc.

By the given statement you can notice that each omelet demands 6 eggs. Then, after making each omeltet Al has 6 eggs lower. This can wrtten numerically as follow:

150, 144, 138, 132, 126, 120,...

That is equivalent to:

150-6, 150-6-6, 150-6-6-6, 150-6-6-6-6, 126-6-6-6-6-6, ... , 150 - 6n

where n is the nth omelet made by counting from the begining of the day.

8 0
1 year ago
Select all the inequalities that have symbols that will be reversed when the variable is isolated.
LenaWriter [7]

Answer:

-4.5c > 9 will have its inequality symbol reversed

-215 ≤ -52d will have its inequality symbol reversed

Step-by-step explanation:

anytime you are multiplying or dividing an inequality by a negative you must reverse the inequality symbol

5 0
2 years ago
Which plane figure generates a cylinder when it rotates about the dashed line?
Marina CMI [18]
I am not exactly sure, but I am almost positive it is a spere 
7 0
3 years ago
Ja'kniya and Alayjah are shopping at the Apple Store. Ja'kniya bought 4 screensavers and 3 Otterboxes for $29. Alayjah bought 6
Katarina [22]

Answer:  Each screensaver costs $2 and each Otterbox costs $7.

Step-by-step explanation:

Let x = Cost of each screensaver and y = cost of each Otterbox.

As per given, 4x+3y=29       (i)

6x +2y = 26  (ii)

Divide both sides of (i) by 2 and the multiply it by 3 on sides , we get

9x+3y=39    (iii)

Eliminate (i) from (iii) , we get

5x = 10

⇒ x = 2  [Divide both sides by 5]

Put value of x in (i), we get

4(2)+3y=29

⇒ 8+3y= 29

⇒ 3y= 21

⇒ y =7 [Divide both sides by 7]

Hence, Each screensaver costs $2 and each Otterbox costs $7.

7 0
3 years ago
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