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TEA [102]
2 years ago
8

Find the value of this expression if x= -7 x^2+5/x+1

Mathematics
1 answer:
Ray Of Light [21]2 years ago
8 0

Answer:

-9

Step-by-step explanation:

Replace x with -7 in the expression:

x^2 + 5 / x + 1

-7^2 + 5 / -7 + 1

49 + 5 / -6

54/-6

simplify the fraction

9/-1 = -9

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Step-by-step explanation:

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3 years ago
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Suppose that a recent poll found that 49​% of adults believe that the overall state of moral values is poor. Complete parts​ (a)
Lunna [17]

Answer:

The mean of X is 122.5 and the standard deviation is 7.9.

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they believe that the overall state of moral values is poor, or they do not believe this. The probability of an adult believing this is independent of other adults. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

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The standard deviation of the binomial distribution is:

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In this problem, we have that:

n = 250, p = 0.49

So

E(X) = np = 250*0.49 = 122.5

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3 0
3 years ago
What’s the answerrr..........
Afina-wow [57]

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8 0
2 years ago
In circle D, if the measure of arc Gec is 230 , what is the measure of minor arc GFC
BabaBlast [244]

Answer:

The measure of minor arc GFC is 130\°

Step-by-step explanation:

we know that

In a circle the sum of the major arc plus the minor arc is equal to 360 degrees

see the attached figure to better understand the problem

Let

x------> the major arc GEC

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3 years ago
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Right angle
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3 years ago
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