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2 years ago

HELPPP?!!! What is the value of f(-2) and f(3)

Mathematics

1 answer:

Cerrena [4.2K]2 years ago

3 0

Step #1 for both: figure out which interval your x-value fits into.
For f(-2), x=-2 and -2 fits with x ≤ -2, the top interval.
For f(3), x=3 and 3 fits into -2 < x ≤ 3, the middle interval.

Step #2 for both, plug in your x-value to the piece of the function that fits with that interval.
For f(-2), we know x≤-2, so we use 2x+8 to evaluate x=-2.
For f(3), we know -2
f(-2) = 2(-2)+8 = -4+8 = 4

f(3) = (3)^2 -3 = 9-3 = 6

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What is the additive inverse of the polynomial? -6x^3+4x^2-4x

LenKa [72]

Answer:

The additive inverse is equal to $6x^{3}-4x^{2}+4x$

Step-by-step explanation:

we know that

Two polynomials area additive inverses if they are opposites of each other

we have

$-6x^{3}+4x^{2}-4x$

To find the additive inverse multiply the polynomial by -1

$-1*(-6x^{3}+4x^{2}-4x)=6x^{3}-4x^{2}+4x$

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3 years ago

a taxi hurries with a constant speed of 38 miles per hour. how long will it take to travel a distance of 95 miles

lisabon 2012 [21]

Answer:

2.5 hours

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3 years ago

Read 2 more answers

How can I calculate if a given decimal is rational or irrational. please help I forgot.

dalvyx [7]

Well, a rational decimal is like a simple 3.1 or 4.5. It just cuts off easily. Another example would be a repeating decimal like 3.333333...

An irrational decimal is like 3.1415682983523576294875 with no pattern or cutoff point.

Sorry if I am wrong.

4 0

2 years ago

Need help fast please!!!!

Travka [436]

A. m < 125° is the answer

when added together the two angles must be less than 180 degrees.

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3 years ago

The value of homes sold in Hampton VA are normally distributed with a mean of $200,000 and a standard deviation of $10,000. If 1

LenKa [72]

Answer:

84%

Step-by-step explanation:

What we must do is calculate the z value for each value and thus find what percentage each represents and the subtraction would be the percentage between those two values.

We have that z is equal to:

z = (x - m) / (sd)

x is the value to evaluate, m the mean, sd the standard deviation

So for 190000 we have:

z = (190000 - 200000) / (10000)

z = -1

and this value represents 0.1587

for 230000 we have:

z = (230000 - 200000) / (10000)

z = 3

and this value represents 0.9987

we subtract:

0.9987 - 0.1587 = 0.84

Which means that it represents 84% of the houses

3 0

3 years ago