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3 years ago

Which expression is equal to (f+g)(x)?

Mathematics

2 answers:

sineoko [7]3 years ago

7 0

Answer:

x^2 +x+2

Step-by-step explanation:

f(x) = x^2+3

g(x) = x-1

f(x)+ g(x) = (f+g) (x)

x^2+3+ x-1

x^2 +x+2

Grace [21]3 years ago

7 0

Answer:

x² + x + 2

Step-by-step explanation:

To find (f + g)(x), you add f(x) and g(x).

f(x) = x² + 3

g(x) = <u> x - 1 </u>

(f + g)(x) = x² + x + 2

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If you flip a fair coin 7 times, what is the probability that you will get exactly 4 tails?

andre [41]

Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: $\frac{35}{128}$

Step-by-step explanation:

We need to find the probability that you will get exactly 4 tails, if you flip a fair coin 7 times.

This is the combination question.

The total combinations will be: 2^7=128

Now, finding number of ways we can get exactly 4 tiles:

We will use the formula:

$^nC_k=\frac{n!}{k!(n-k)!}$

in our given question, n= 7, k= 4

Putting values:

$^nC_k=\frac{n!}{k!(n-k)!}\\^7C_4=\frac{7!}{4!*3!}\\ ^7C_4=\frac{7*6*5*4!}{4!*3!}\\ ^7C_4=\frac{7*6*5}{6}\\ ^7C_4=35$

So, Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: $\frac{35}{128}$

Keywords: Probability

Learn more about Probability at:

#learnwithBrainly

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2 years ago

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Andre45 [30]

the answer is step by step CFE

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2 years ago

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Sindrei [870]

Answer:

Step-by-step explanation:

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2 years ago

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Step-by-step explanation:

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