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3 years ago

Which pair of functions are inverse functions? PLEASE ILL GIVE BRAINLIEST

Mathematics

1 answer:

algol133 years ago

7 0

Answer:

Step-by-step explanation:

To find an inverse function you switch f(x) and x, and solve for f(x) (in this case you also rename it to g(x) )

inverse of y=(x-4)/5 is

5x = x -4

x = 5x + 4 so A works

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I need help, please and thank you

borishaifa [10]

Answer:

See below ↓

Step-by-step explanation:

Problem

$\frac{5x}{x+7} + \frac{7}{x}$

Work

$\frac{5x(x)+7(x+7)}{x(x+7)}$
$\frac{5x^{2} +7x+49}{x(x+7)}$
The student's mistake was that instead of taking x(x + 7) as the LCM (Least Common Multiple), he took x + 7, which is not possible in this case

Solution

$\frac{5x^{2} +7x+49}{x(x+7)}$

5 0

2 years ago

Evaluate the limit of lim/n->infinity 6n^2+5/3n^2

castortr0y [4]

we are given

$\lim_{n \to \infty} \frac{6n^2+5}{3n^2}$

we can see that

degree of numerator = degree of denominator =2

so, we can divide both numerator and denominator by n^2

and we get

$\lim_{n \to \infty} \frac{(6n^2+5)/n^2}{(3n^2/n^2)}$

$\lim_{n \to \infty} \frac{(6n^2/n^2)+(5/n^2)}{(3n^2/n^2)}$

now, we can simplify it

$\lim_{n \to \infty} \frac{6+(5/n^2)}{3}$

now, we can plug n=inf

$= \frac{6+(5/(\infty))}{3}$

$= \frac{6+0}{3}$

$= \frac{6}{3}$

$= 2$ ...............Answer

6 0

3 years ago

Read 2 more answers

A triangle was translated 4 units down.

olasank [31]

Answer:try and use a calculator

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

f x + y is rational, must x and y each be rational? A) Yes; because the sum of rationals is rational. B) No; because the sum of

Rudik [331]

The answer is D) Yes; because x and y must be integers, and integers are rational.

7 0

3 years ago

What is 1 and 1/4 minus 3/8?

matrenka [14]

Answer: 7/8

Step-by-step explanation:

You can change all the fractions to have equivalent denominators.

The Least Common Denominator of 1 1/4 and 3/8 is 8. Now we can change the fractions.

1 1/4 = 1 2/8 = 10/8.

3/8 = 3/8.

Now we can subtract. Subtract the numerators of the first fraction from the numerators of the second fraction, and the denominators oft he first fraction to the denominators of the second fraction.

10/8 - 3/8 = 7/8.

Therefore, 1 1/4 - 3/8 = 7/8; the fourth answer.

6 0

3 years ago