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3 years ago

PLEASE HELP ME!! :(

Mathematics

1 answer:

inessss [21]3 years ago

4 0

Step-by-step explanation:

(f - g)(x)

= f(x) - g(x)

= (4x² - 6) - (x² - 4x - 8)

= 4x² - 6 - x² + 4x + 8

= 3x² + 4x + 2. (B)

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Step-by-step explanation:

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in other words

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2 years ago

I need help on this one its hard for me :(

Zinaida [17]

Answer:

Step-by-step explanation:

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3 years ago

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NARA [144]

Answer:

The first error she made in computing the variance was to have placed -1,024 instead of +1,024

Step-by-step explanation:

we have the data set

87, 46, 90, 78, and 89

step 1

Find the mean

$(87+46+90+78+89)/5$

$390/5=78$

step 2

Subtract the Mean for each value of data set and square the result and then adds the numbers

$(87-78)^{2}+(46-78)^{2}+(90-78)^{2}+(78-78)^{2}+(89-78)^{2}$

$(9)^{2}+(-32)^{2}+(12)^{2}+(0)^{2}+(11)^{2}$

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The first error she made in computing the variance was to have placed -1,024 instead of +1,024

$1,370$

step 3

Work out the mean of those squared differences

$1,370/5=274$ ----> this value is called the "Variance"

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