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marysya [2.9K]
3 years ago
14

Let f(x)=x^2 +2 and g(x)=1-3x. find each function value: (fg)(-1)

Mathematics
2 answers:
sammy [17]3 years ago
6 0

Answer:

12

Step-by-step explanation:

so basically

(x^2+2)*(1-3x)=-3x^3+x^2-6x+2

now plug in -1

-3(-1)^3+(-1)^2-6(-1)+2=12

hope this helped :)

photoshop1234 [79]3 years ago
3 0

The correct value of (fg)(-1) is "12". A further solution of the given query is provided below.

Given functions are:

f(x) = x^2+2

g(x) = 1-3x

Now,

⇒ (fg) = (x^2+2)(1-3x)

By applying multiplication, we get

           =x^2+2-3x^3-6x

           =-3x^3+x^2-6x+2...(equation 1)

By substituting the value "-1" in place of "x" in equation 1, we get

⇒ (fg)(-1) = -3(-1)^3+(-1)^2-(6)(-1)+2

                  =-3(-1)+1+6+2

                  =3+1+6+2

                  =12

Thus the right answer is (fg)(-1) = 12.

Learn more:

brainly.com/question/10057660

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BlackZzzverrR [31]

Answer:

Is the number of tosses for each coin enough for the sampling distribution of the difference in sample proportions PA-PB to be approximately normal?

b. No, 20 tosses for coin A is enough, but 20 tosses for coin B is not enough.

Step-by-step explanation:

a) Data and Calculations:

The probability of coin A landing tails-side up = 0.5

The proportion of times coin A lands tails-side up (PA) = 20 * 0.5 = 10

Therefore, the probability of coin A landing heads-side up = 0.5 (1 - 0.5)  

And the proportion of times that coin A lands heads-side up = 20 * 0.5 = 10.  

The proportion on either side is equally distributed.

This is why 20 tosses for coin A is enough, since the sample proportions PA is approximately normal, symmetric, and equally distributed.  There will be equal amounts of 10 tosses (0.5 *20) for either heads-side up or tails-side up.

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The proportion on either side is not equally distributed, but skewed.

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Answer:

Step-by-step explanation:

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but if you are just trying to get the discount from 96.25 you subtract 38.5 from 96.25

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