3 years ago

How do you work out the mean mark ?

1 answer:

4 0

Answer:

The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count.

Step-by-step explanation:

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Select the slope (m) and y-intercept (b). 2x+y=4

Elena L [17]

Answer:

y=-2x+4

Step-by-step explanation:

You want to get y by itself, so you would subtract 2x from both sides giving you, $y=-2x+4$ . -2x is the slope (m), and 4 is the y-intercept (b).

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2 years ago

Is the first answer correct and what's the next answer? Thanks

JulijaS [17]

Answer:

First answer is correct and the answer for the second question is a = 30

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What is the slope of the line that contains the points (–5, 6) and (14, –7)?

Morgarella [4.7K]

$\bf \begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
% (a,b)
&&(~ -5 &,& 6~) 
% (c,d)
&&(~ 14 &,& -7~)
\end{array}
\\\\\\
% slope = m
slope = m\implies 
\cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{-7-6}{14-(-5)}\implies \cfrac{-7-6}{14+5}\implies \cfrac{-13}{19}$

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2 years ago

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Molodets [167]

Here is one way to do it. See the attached image.

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3 years ago

-27+9-3+1 using sigma notation

Vesna [10]

Do you have question choices if not then I'll try I guess...... -27+9-3+1 36-3+1 3

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3 years ago