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vlada-n [284]
3 years ago
15

If f(x) = 5x + 4, which of the following is the inverse of f(x)?​

Mathematics
1 answer:
stealth61 [152]3 years ago
3 0

set f(x) equal to y

y = 5x + 4

swap x and y

x = 5y + 4

make y the subject

x - 4 = 5y

y =  \frac{x - 4}{5}

replace y with f^-1(x)

f(x) =  \frac{x - 4}{5}

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Sindrei [870]

Gánster:

polígono

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3 0
3 years ago
Please answer the question now in two minutes
oksian1 [2.3K]

Answer:

Coordinates of point P is (-14,3).

Step-by-step explanation:

Given that mid point of line segment \overline {PQ} is at <em>M(-9, 8.5).</em>

Q is at <em>(-4, 14)</em>.

Let coordinate of P be (x,y).

Using the ratio, we can say the following:

<em>The coordinates of mid point</em> (X,Y) of a line with endpoints (x_1, y_1) and (x_2, y_2) is given as:

X=\dfrac{(x_1+ x_2)}{2}

Y=\dfrac{(y_1+ y_2)}{2}

Using the formula for above given dimensions:

-9 =\dfrac{x+(-4)}{2}\\\Rightarrow x = -18+4 = -14

8.5=\dfrac{(14+ y)}{2}\\\Rightarrow y = 17-14 =3

So, the <em>coordinates of point P are</em> (-14,3).

6 0
4 years ago
The length of a rectangle is twice its width. if the perimeter of the rectangle is 36 cm , find its area.
Brut [27]
L = Length
W = Width

L x W = area
Length = 2w

Lets find the width by solving for w.
2w + w = 36 
3w = 36
3w/3 = 36 / 3 
w = 12

So
L = 2 x 12 = 24
W = 12
L X W = area
24 x 12 = 288 cm^2

6 0
3 years ago
What do you get when you subtract 9 from b?
In-s [12.5K]
Answer:

4

step by step:

b-9=4
5 0
3 years ago
Math help will give brainliest<br>X is 7 but I got m angle D wrong
STatiana [176]
Answers: 
x = 7
The measure of angle D is 14 degrees

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

Angle C and angle D are complementary, which means they add to 90 degrees. 

(angle C) + (angle D) = 90
(12x-8) + (3x-7) = 90
12x-8 + 3x-7 = 90
(12x+3x) + (-8-7) = 90
15x-15 = 90
15x-15+15 = 90+15
15x = 105
15x/15 = 105/15
x = 7

So you have the correct x value. Nice work.

Now use this x value to find the measure of angle D

angle D = 3*x - 7
angle D = 3*7 - 7
angle D = 21 - 7
angle D = 14 degrees

5 0
3 years ago
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