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pychu [463]
3 years ago
9

Help pls, confused .

Mathematics
2 answers:
frutty [35]3 years ago
5 0

ANSWER

{f}^{ - 1} (x)=  \frac{7x + 3}{4}

EXPLANATION

The given function is

f(x) =  \frac{4x - 3}{7}

Let

y = \frac{4x - 3}{7}

We now interchange x and y to obtain:

x = \frac{4y - 3}{7}

Next, we have to make y the subject.

\frac{x}{1}  = \frac{4y - 3}{7}

Cross multiply:

7x =4y-3

Add 3 to both sides:

7x+3=4y

y =  \frac{7x + 3}{4}

Therefore the inverse is

{f}^{ - 1} (x)=  \frac{7x + 3}{4}

The last choice is correct.

zloy xaker [14]3 years ago
3 0

Answer:

ooo that looks hard maybe you should ask for help

Step-by-step explanation:

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If one three-digit number ( 0 cannot be a left digit) is chosen at random from all those that can be made from the following set
Oksana_A [137]

The probability of choosing a number that is not a multiple of 2 is P = 0.44

<h3 /><h3>How to find the probability?</h3>

We need to count the number of options for each digit.

  • For the first digit, we have 8 options {1, 2, 3, 4, 5, 6, 7, 8}
  • For the second digit, we have 9 options {0 ,1, 2, 3, 4, 5, 6, 7, 8}
  • For the third digit, we have 9 options {0 ,1, 2, 3, 4, 5, 6, 7, 8}.

The total number of combinations is the product between the numbers of options:

C = 8*9*9 = 648

If we want our number to not be a multiple of 2 then it must end in a odd digit, the combinations that meet that condition are:

  • For the first digit, we have 8 options {1, 2, 3, 4, 5, 6, 7, 8}
  • For the second digit, we have 9 options {0 ,1, 2, 3, 4, 5, 6, 7, 8}
  • For the third digit, we have 4 options {1, 3,  5, 7}.

C = 8*9*4 = 288

Then the probability of selecting a 3 digit number that is not a multiple of 2 is:

P = 288/648 = 0.44

If you want to learn more about probability, you can read:

brainly.com/question/251701

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Complex roots always come in pairs, and those pairs are made up of a positive and a negative version. If 6i is a root, then its negative value, -6i, is also a root.

If you want to know the reasoning, it's along these lines: to even get a complex/imaginary root, we take the square root of a negative value. When you take the square root of any value, your answer is always "plus or minus" whatever the value is. The same thing holds for complex roots. In this case, the polynomial function likely factored to f(x) = (x+8)(x-1)(x^2+36). To solve that equation, you set every factor equal to zero and solve for the x's.

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