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3 years ago

If x=9, what is the value of your in the equation below? y=8x-(1+4x)

Mathematics

2 answers:

n200080 [17]3 years ago

8 0

Plug 9 in. This is what the equation would look like.
Y=8(9)-(1+4(9))
Y=72-(5(9))
Y=72-45
Y=27

Phantasy [73]3 years ago

5 0

Y=72-(1+36)
Y=72-37
Y=35

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Enter the inequality given by the graph below.

Rudiy27

The slope of the line is: m=(5-0)/(-3-2)=-1
y=-x+b
find out b by using a point: 0=-2+b, b=2
so the equation of the line is y=-x+2
it is dotted, so they should be an equal sign.
the shaded part is to the right, above the line, so it is a >
the inequality is y>-x+2

4 0

4 years ago

The equation cos super negative 1 (StartFraction 3.4 Over 10 EndFraction)equals x can be used to determine the measure of angle

Dmitriy789 [7]

Answer:

70 degrees

Step-by-step explanation:

$cos^{-1} \frac{3.4}{10}=x$

This implies that: $cos x= \frac{3.4}{10}$ Recall: $cos x=\frac{adjacent}{hypotenuse}$

From the diagram

Angle CAB, $x=cos^{-1} \frac{3.4}{10}=70.1 degrees$ =70 (to the nearest degree)

6 0

4 years ago

Read 2 more answers

Q1 : Find the inverse of the function.

Mamont248 [21]

Answer:

1. Option D is correct.

2. Option B is correct.

3. Option B is correct.

Step-by-step explanation:

Inverse function defined as the the function that undergoes the action of the other function.

A function $f^{-1}$ is the inverse of f if whenever y =f(x) and $x =f^{-1}$

To find the inverse of the function:

Q1.

Given the function: f(x) = 7x -1

Put y for f(x) and solve for x;

y= 7x -1

Add 1 both sides we get;

y + 1 = 7x

Divide both sides by 7 we get;

$x = \frac{y+1}{7}$

Put $f^{-1}(y)$ for x;

$f^{-1}(y) = \frac{y+1}{7}$

Interchange y =x, we have

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

Q 2.

Given the function:

$f(x) = x^3 - 7$

Put y for f(x) and solve for x;

$y = x^3-7$

Add 7 both sides we get;

$y + 7 =x^3$

taking cube root both sides we get

$x =\sqrt[3]{y+7}$

Put $f^{-1}(y)$ for x;

$f^{-1}(y) =\sqrt[3]{y+7}$

Interchange y =x, we have

$f^{-1}(x) = \sqrt[3]{x+7}$

Q3 .

Given the function:

$f(x) = 5x^3 - 3$

Put y for f(x) and solve for x;

$y = 5x^3-3$

Add 3 both sides we get;

$y + 3 =5x^3$

Divide both sides by 5 we get;

$x^3 = \frac{y+3}{5}$

taking cube root both sides we get

$x = \sqrt[3]{\frac{y+3}{5} }$

Put $f^{-1}(y)$ for x;

$f^{-1}(y) = \sqrt[3]{\frac{y+3}{5} }$

Interchange y =x, we have

$f^{-1}(x) = \sqrt[3]{\frac{x+3}{5} }$

7 0

3 years ago

3 3/8+4 5/7x=12 45/56

Sunny_sXe [5.5K]

Answer:

x = 2

Step-by-step explanation:

3 3/8+4 5/7x=12 45/56

Solve :

3 3/8+4 5/7x=12 45/56

27/8 + 33/7 x = 717/56

33/7 x = (717 - 189) / 56

33/7 x = 528/56

x = 2

8 0

3 years ago

Which graph shows a method for finding the image of point D if the parallelogram is reflected across the dashed line?

Ber [7]

Answer:

The third option with the right angle

Step-by-step explanation:

By creating a perpendicular line through the line of reflection (the orange dotted line) and the point "D" we can measure the distance of D from the line of reflection. Then draw "D'" using the distance of the "D" from the line of reflection.

5 0

3 years ago