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4 years ago

11

CAN SOMEONE HELP???????????????????? all 3 plzzz

1 answer:

ziro4ka [17]4 years ago

4 0

Answer: They are all letter A.

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If <img src="https://tex.z-dn.net/?f=%5Cfrac%7Bx%2B3%7D%7B4%7D" id="TexFormula1" title="\frac{x+3}{4}" alt="\frac{x+3}{4}" align

AleksAgata [21]

Answer:

$f^{-1}(x) = 4x-3$ is the right answer.

Step-by-step explanation:

I the function is $f(x) = \frac{x+3}{4}$

$f(x)=\frac{1}{4}(x+3)$

Then we have to find inverse of function f(x).

we will write the equation as $y=\frac{1}{4}(x+3)$

4y = x + 3

x = 4y - 3

Now we will rewrite the function as

$f^{-1}(x) = 4x-3$

So the answer is $f^{-1}(x) = 4x-3$

3 0

4 years ago

Read 2 more answers

A) What is the equation of the line that passes through the given pair points in slope-intercept form?

lesya [120]

A)

The slope-intercept form:

$y=mx+b$

m - slope

b - y-intercept

The formula of a slope:

$m=\dfrac{y_2-y_1}{x_2-x_1}$

We have the points (2, 5.1) and (-1, -0.5). Substitute:

$m=\dfrac{-0.5-5.1}{-1-2}=\dfrac{-5.6}{-3}=\dfrac{5.6}{3}=\dfrac{56}{30}=\dfrac{28}{15}$

Therefore we have:

$y=\dfrac{28}{15}x+b$

Put the coordinates of the point (-1, -0.5) ot the equation:

$-0.5=\dfrac{28}{15}(-1)+b$

$-0.5=-\dfrac{28}{15}+b$ <em>multiply both sides by 2</em>

$-1=-\dfrac{56}{15}+2b$ <em>add $\dfrac{56}{15}$ to both sides</em>

$\dfrac{41}{15}=2b$ <em>divide both sides by 2</em>

$b=\dfrac{41}{30}$

Answer: $\boxed{y=\dfrac{28}{15}x+\dfrac{41}{30}}$

-------------------------------------------------------------------------

B)

We have the points (-2, 3) and (3, -4).

Calculate the slope:

$m=\dfrac{-4-3}{3-(-2)}=\dfrac{-7}{5}=-\dfrac{7}{5}$

Therefore we have:

$y=-\dfrac{7}{5}x+b$

Put the coordinates of the point (-2, 3) to the equation of a line:

$3=-\dfrac{7}{5}(-2)+b$

$\dfrac{15}{5}=\dfrac{14}{5}+b$ <em>subtract $\dfrac{14}{5}$ from both sides</em>

$\dfrac{1}{5}=b\to b=\dfrac{1}{5}$

Answer: $\boxed{y=-\dfrac{7}{5}x+\dfrac{1}{5}}$

7 0

4 years ago

Helen [10]

A= 8
Because
25 : 5
40 : a?
Cross multiplication
200 : 25a
Divide both sides by 25
You will get 8!
Hope this helps
Please make me brainliest

6 0

3 years ago

Read 2 more answers

What is 87 24 over 25 as a decimal

erastova [34]

8724/25 = 348.96
When you say "over" that means that it has to be divided that short subtraction sign that separates the numerator and the denominator and also means divide so I believe that if you divide you can find the decimal.

7 0

3 years ago

Find the length of the side and perimeter of the square whose area is given<br>(a) 49 sq.m

Alja [10]

Answer:

Length 7metres

Perimeter 28 metres

Step-by-step explanation:

Area of a square is L²

To get the length of one side is thus√L²

√49=7 metres

Perimeter will be length by 4

7×4=28 metres

7 0

3 years ago