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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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Answer:

The percentage of people that could be expected to score the same as Matthew or higher on this scale is:

= 93.3%.

Step-by-step explanation:

a) Data and Calculations:

Mean score on the scale, μ = 50

Distribution's standard deviation, σ = 10

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Calculating the Z-score:

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Answer:

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Step-by-step explanation:

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Lunna [17]

The sum is 4x³ + 3x² + 2x – 6.

Solution:

The correct question is given below.

(4x³ – 2x² + 3x – 1) + (5x² – x – 5). What is the sum?

<u>To find the sum of the polynomial:</u>

Sum of (4x³ – 2x² + 3x – 1) and (5x² – x – 5)

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Group like terms together.

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Add the similar elements. i.e the element with same power.

           = 4x³ + 3x² + 2x – 1 – 5

Subtract the constant terms.

           = 4x³ + 3x² + 2x – 6

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