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3 years ago

Find the sum and choose the correct answer.

Mathematics

2 answers:

Alborosie3 years ago

5 0

B, n to the 3rd power + 4n to the 2nd power +8n -16

Alborosie3 years ago

5 0

Answer:

Option B (n³ + 4n² + 8n - 16)

Step-by-step explanation:

In this question we have to add two expressions given

( 2n³ + 4n² - 7 ) and ( -n³ + 8n - 9 )

( 2n³ + 4n² - 7 ) + ( -n³ + 8n - 9 )

Now we group the similar terms

( 2n³ - n³ ) + 4n² - ( 7 + 9 ) 8n

= n³ + 4n² - 16 + 8n

= n³ + 4n² + 8n - 16

Option B (n³ + 4n² + 8n - 16) is the correct answer.

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If Karri takes a 7 question true false test and guess on every question, what is the

dusya [7]

Answer:

The probability that she gets all 7 questions correct is 0.0078.

Step-by-step explanation:

We are given that Karri takes a 7 question true-false test and guess on every question.

The above situation can be represented through binomial distribution;

$P(X = r) = \binom{n}{r} \times p^{r} \times (1-p)^{n-r} ; x = 0,1,2,3,........$

where, n = number of samples (trials) taken = 7 question

r = number of success = all 7 questions correct

p = probability of success which in our question is probability that

question is correct, i.e. p = 50%

Let X = Number of question that are correct

So, X ~ Binom(n = 7, p = 0.50)

Now, the probability that she gets all 7 questions correct is given by = P(X = 7)

P(X = 7) = $\binom{7}{7} \times 0.50^{7} \times (1-0.50)^{7-7}$

= $1 \times 0.50^{7} \times 0.50^{0}$

= 0.0078

6 0

3 years ago

Continue the following pattern; describe the eighth figure in this pattern

Bumek [7]

The correct answer would be C. Hope that helps.

5 0

3 years ago

Read 2 more answers

If f(x) = 2x + 6 and g(x) = -4x - 8 find f(g(x)) = ?x+?

amm1812

hope it helps

plz mark brainliest

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3 years ago

9/4 is between what two numbers

Debora [2.8K]

9/4 is between 2 and 3

3 0

3 years ago

Arrange the steps to solve this system of linear equations in the correct sequence x+y=-2 2x-3y=-9

balu736 [363]

there you go the correct ans

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3 years ago