I just need to know the answers for number 3. I don’t understand how to do it. Thank u sm!

Answer:

C

Step-by-step explanation:

By the definition of an inverse function, if:

[tex]f(a)=b\text{ then } f^{-1}(b)=a[/tex]

Therefore, the domain of the original function will be the range of the inverse function.

And the range of the original function will be the domain of the inverse function.

We have the original function:

[tex]f(x)=2x^2-5[/tex]

With the domain:

[tex]-\infty<x<\infty[/tex]

Since the domain of the original function is such, then the range of the inverse function is also the same as above.

So, the range of the inverse function is also:

[tex]-\infty< f^{-1}(x)< \infty[/tex]

So, our answer is

C.

Notes:

A, B, and E would automatically be incorrect since we never use ”or equal to” when using the infinity symbol. This is because we can never “equal” infinity.

Answer:

5/8

Step-by-step explanation:

1/4=2/8

7/8-2/8=5/8

Answer:

x=y

Step-by-step explanation:

Answer:

Definition: The x-intercept is the point where a line crosses the x-axis, and the y-intercept is the point where a line crosses the y-axis.

Example: From the graph, describe the x and y-intercepts using point notation. The graph crosses the x-axis at x = 1 and x = 3, therefore, we can write the x-intercepts as points (1,0) and (–3, 0). Similarly, the graph crosses the y-axis at y = 3. Its y-intercept can be written as the point (0,3).

9514 1404 393

Answer:

  43°

Step-by-step explanation:

Following the instructions is generally useful.

  5x +9 = 30 -3x +27 +2x

  6x = 48 . . . . add x-9

  x = 8 . . . . . . .divide by 6

  27 +2x = 27 +2(8) = 43 . . . . substitute into the expression for angle DFE

angle DFE = 43°

Answer:

x=2

Step-by-step explanation:

4(x+2) = 16

Divide each side by 4

4/4(x+2) = 16/4

x+2 = 4

Subtract 2 from each side

x+2-2 =4-2

x =2

Answer:

x is 2

Step-by-step explanation:

parenthesis first ok ... 2 plus 2 is 4 ok?

and then 4 times 4 is 16 and the numbers haveta equal 16 so there u go mate x equals 2 yall

hope this helps

have a great day

im brooke btw

Answer:

I think the answer is 25 feet

Step-by-step explanation:

5 / 7.25 = .6896551724

.6896551724 x 36.25 = 25

Answer:

4/5

Step-by-step explanation:

12-8=4

10-5=5

4/5 is the slope

Answer:

-24/12= -2

Step-by-step explanation:

Answer:

Its B

Step-by-step explanation:

If I'm wrong please tell me

Answer:

16x^2+36x-10

Step-by-step explanation:

  2 (4x - 1)(2x + 5)

=2(8x^2-2x+20x-5)

=2(8x^2+18x-5)

=16x^2+36x-10

Answer: A. approximately 37.33° above the ground

Step-by-step explanation:

edge2020

The correct solution to the problem is that the direction of the resultant force will be approximately 37.33° from the horizontal above the ground.

For 30° Vector of 40 pounds :-

If we divide it in components it will become

40 cos 30° Î + 40 sin 30° Ĵ

40 × ( √3 / 2 ) Î + 40 × ( 1 / 2 ) Ĵ

34.64 Î + 20 Ĵ    ( approximately )

For 45° Vector of 35 pounds :-

If we divide it in components it will become

35 cos 45° Î + 35 sin 45° Ĵ

35 × ( 1 / √2 ) Î + 35 × ( 1 / √2 ) Ĵ

24.75 Î + 24.75 Ĵ    ( approximately )

Now adding both vectors

( 24.75 + 34.64 ) Î + ( 24.75 + 20 ) Ĵ    ( approximately )

59.39 Î + 44.74 Ĵ    ( approximately )

Now Using formula of Tan θ to find the value of θ

( Tan θ = Perpendicular / Base )

Tan θ =  44.74 / 59.39

Tan θ =  0.75    ( approximately )

θ =  Tan⁻¹ (0.75)    ( approximately )

θ =  36.87°    ( approximately )

We are calculated the value of θ as 36.87° which is approximate value as we used a lot of approximations while calculating and, the closest option given is 37.33° which is again an approximate value.
So we can say that the correct answer to this problem is The direction of the resultant force will be approximately 37.33° from the horizontal above the ground.

Learn more about Vectors here:

https://brainly.com/question/25705666

#SPJ2

Your sentence:

16 < 4x

Answer:

12

Step-by-step explanation:

If x=0, then the y axis is 6

If y=0, then the x axis is 4

The base is 4 and the height is 6

4 x 6 / 2 = 12

Answer:

17 will change to 42.5

8 will change into 20

and

15 will change into 37.5

Step-by-step explanation:

Multiply them all by 2.5

Answer:

A 37.5 cm x 20 cm x 42.5 cm

Step-by-step explanation:

Its  37.5 cm x 20 cm x 42.5 cm

Answer:

-7/3

Step-by-step explanation:

Since the lines are parallel, the slopes would have to be the same

Given :

An online store sells only two types of bandanas: cotton bandanas and silk bandanas. Cotton bandanas cost $7 each, and silk bandanas cost $11 each.

Mrs. Tran spent a total of $93 on bandanas at this store.

To Find :

How many cotton bandanas did Mrs. Tran buy.

Solution :

Let, number of cotton and silk bandanas buys are x and y respectively.

So, 7x + 11y = 93

x = (93 - 11y)/ 7

Putting y = 1 , x = 82/7 ( not possible since x can only be positive integer )

Putting y = 4 , x = 7

Therefore, Mrs . Tran will buy 7 cotton bandanas.

Hence, this is the required solution.

Answer:

I tried my best so I hope this helps :)

(look at the screenshots for the work I don't feel like typing it out)

Step-by-step explanation:

1.) the solution is  [tex]x=\frac{-3+\sqrt{30}}{3}\\[/tex], [tex]x=-\frac{3+\sqrt{30}}{3}[/tex]

2.) the solution is  [tex]n=4,\:n=-1[/tex]

3.) the solution is  [tex]x=-4+\sqrt{26},\:x=-4-\sqrt{26}[/tex]

Try using Symbolab, I use it all the time it gives the correct answer and it gives good explanations.

Answer:

5040a^2b^2

Step-by-step explanation:

(3a2b7)(5a3b8)

(42ab)(120ab) multiply everything inside each parenthensis

42ab * 12ab remove parenthesis

5040a^2b^2 multiply

Answer:

$12

Explanation: 60 x .2= 12 + 60= $72

Answer:

1.3x10^-6

Step-by-step explanation:

Use a calculator.

0.00065/5 will give you 0.00013 which can be written as 1.3x10^-4 and multiply that by 10^-2, you will add the exponents -4+-2 and get -6 as your new exponent, ending with 1.3x10^-6

Answer:

The one above is incorrect, the answer is:

1.3 x 10-2

Answer:

D

Step-by-step explanation:

Here, we want to select which of the options that could actually be the inverse of function g

The function that could actually be an inverse is that function in which we have a reversal of values

What we mean in this case is that the x values take up the f(x) values while the f(x) values take up the x values

With respect to this question, the option that fits this description is;

Option D

Answer: For Plato users

Step-by-step explanation:

The correct answer is B .

Just flip the x and y

Answer:

So BD= 2*(y+4) -> 2*(4+4) = 16

and AX is the same lenght as BX so: AX = y+4 -> 4+4 = 8

Step-by-step explanation:

hope that helped

Answer:

h(x)=20

Step-by-step explanation:

x=5

3(5)+5

15+5

20

Hope this helps!

Answer:20

Step-by-step explanation:

Hello!

So first you want to plug in 5 to all of the x

h(5) = 3(5) + 5

No you want to do 3(5)

3(5) = 15

h(5) = 15 + 5

Now you add 15 + 5

15 + 5 = 20

h(5) = 20

So your answer is 20

Answer:

The lengths of the sides of the triangle in cm are 32 cm, 36 cm and 40 cm

Step-by-step explanation:

The lengths of side of the triangle are in ratio 8:9:10

Perimeter of triangle = 108 cm

We need to find length of sides of triangles.

The formula used is: [tex]Perimeter \ of \ triangle = Sum \ of \ all \ sides \ of \ triangle\\[/tex]

The length of side of triangle can be expressed as:

First side= 8x

Second Side =9x

Third Side=10x

So, finding x and then calculate length of each side

[tex]Perimeter \ of \ triangle = Sum \ of \ all \ sides \ of \ triangle\\\\108=8x+9x+10x\\108=27x\\x=\frac{108}{27}\\x=4[/tex]

So, value of x = 4

The length of sides of triangle will be found by putting value of x at each side.

First side= 8x = 8*4 = 32 cm

Second Side =9x= 9*4= 36 cm

Third Side=10x = 10*4=40 cm

So, The lengths of the sides of the triangle in cm are 32 cm, 36 cm and 40 cm

Answer:

[tex]\frac{x+7}{5}[/tex]

Step-by-step explanation:

Add 7 to x gives x + 7 then divide this by 5, that is

[tex]\frac{x+7}{5}[/tex]

Answer:

Option A, E ,F are correct

Step-by-step explanation:

f(x).g(x)=(8x^2+4)(-x^2+12x+10)

=(-8x^4+96x^3+80x^2-4x^2+48x+40)

= -8x^4+96x^3+76x^2+48x+40

Leading term is -8x^4. The x term has coefficient 48. The x^2 term has coefficient +76

Answer:

m = [tex]\frac{2}{3}[/tex] , b = - 2

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + b ( m is the slope and b the y- intercept )

Given

2x - 3y = 6 ( subtract 2x from both sides )

- 3y = - 2x + 6 ( divide all terms by - 3 )

y = [tex]\frac{2}{3}[/tex] x - 2 ← in slope- intercept form

with slope m = [tex]\frac{2}{3}[/tex] and y- intercept b = - 2

Answer:

y- intercept is (0, -2)

slope is 2/3

Step-by-step explanation:

find 2 points on the line:

2x-3y=6

1/2*(6+3y) =x

if y is 2, x is 6 ((6,2))

if y is 4, x is 9 ((9, 4))

y-intercept is when x = 0.

0-3y=6

y=-2

slope is (y2-y1)/(x2-x1): choose y2 and the corresponding x-coordinate is x2. then the others are the 1's. let's use 4 as y2 which means:

x2 = 9

x1 = 6

y1 = 2

then plug in and solve.

(4-2)/(9-6)

= 2/3

m = 2/3

Hope this helps!

Answer:

the answer is D

Step-by-step explanation:

It shows both numbers of the graph.

M(-2,0), and N(-1, 2)

Answer:

The answer is x=8

Step-by-step explanation:

hope that helps

9x+89=161

9x+89−89=161−89

9x=72

9x/9=72/9

x=8

Answer:

x = 8

Step-by-step explanation:

We just need to solve for x!

Here is a step-by-step process:

9x + 89 = 161

Subtract 89 from both sides

9x = 72

Divide both sides by 9

x = 8