What is the domain of the function

Answer:

where is the second one?

Step-by-step explanation:

Answer:

V = 40 km/h

Step-by-step explanation:

Total distance = 120 km

Constant speed of train = V km/h

⇒ [tex]Time \: taken \: by \: train = \frac{Distance}{Speed} = \frac{120}{V} \: hr[/tex]

Its given that if speed is reduced by 10 km/h , the time taken by train increases by 1 hour. BUT THE DISTANCE REMAINS SAME. So,

[tex]Speed \times Time = Distance[/tex]

[tex]=> (V - 10)(\frac{120}{V} + 1) = 120[/tex]

[tex]=> 120 + V - \frac{1200}{V} - 10 = 120[/tex]

[tex]=> V - \frac{1200}{V} - 10 = 0[/tex]

[tex]=> \frac{V^2 - 1200 - 10V}{V} = 0[/tex]

[tex]=> V^2 - 10V - 1200 = 0[/tex]

Factorise the quadratic equation.

[tex]=> V^2 - 40V + 30V - 1200[/tex]

[tex]=> V(V - 40) + 30(V - 40)[/tex]

[tex]=> (V - 40)(V + 30)[/tex]

[tex]=> V = 40 \: (or) \: -30[/tex]

Speed can't be negative. So , V = 40 km/h

Answer:

250 = triangle

90 = rhombus

(i think, its all i know)

Step-by-step explanation:

just use 1/2 x b x h for triangles

and A = l x w for rectangles

Step-by-step explanation:

i have solved the question

Answer:

20

Step-by-step explanation:

AP EX Confirmed

Answer:

d

Step-by-step explanation:

The sum of the angles of a triangle is ALWAYS 180 degrees.

Step-by-step explanation:

To evaluate, substitute 29 for the variable in the expression.

To evaluate, substitute 31 for the variable in the equation.

To evaluate the expression, add 31 to 29.

The correct expression is n-31.

To evaluate the expression, subtract 31 from 29Pls hurry

Rafael writes an expression to represent "a number, n, decreased by thirty-one." Then he evaluates that expression if

n-29. Which statements are true about the expression and its evaluation? Check all that apply.

The correct expression is 31-n.

This is a subtraction expression.

This is an addition expression.

To evaluate, substitute 29 for the variable in the expression.

To evaluate, substitute 31 for the variable in the equation.

To evaluate the expression, add 31 to 29.

The correct expression is n-31.

To evaluate the expression, subtract 31 from 29..

Answer:

Your answer will be the 1st, 3rd and 4th/[tex]8(x-3), 9(x-3)-(x-3), and (5+3)x-24[/tex]

Step-by-step explanation:

No explanation since I've had this in the past, but I am 100% sure that it is A, C, and D. Therefore, your answer will be [tex]8(x-3), 9(x-3)-(x-3), and (5+3)x-24[/tex].

Answer: 99.7%

Step-by-step explanation:

A control chart is used in the identification of the assigned causes of variation for a process. The control limits are refered to as the horizontal lines that are below and above the center line which are used in judging whether a particular process is out of control.

In this case, the control limits, which is calculated as three standard deviations from the sample mean, simply means that about 99.7% of the sample points will be expected to fall between upper and lower control limits.

Hi there!

[tex] \large{tan35\degree = \frac{x}{16} }[/tex]

We can also use the other angle but I will focus on 35°.

The reason why we use the equation above because tan is equivalent to opposite/adjacent

From the picture, the opposite is x-term while the adjacent is 16 if we focus angle 35°.

Define theta = 35°. Thus, the equation would be tan35° = x/16.

Solving the equation, you might want to bring open Trigonometric Table or a calculator to calculate tan35°. You should get 0.7 (rounded)

[tex] \large{0.7 = \frac{x}{16} }[/tex]

Then solve the equation for x-term.

[tex] \large{0.7 \times 16 = x} \\ \large{x = 11.2}[/tex]

Hence, the value of x is 11.2

Answer

Questions about the problem be asked through comment.

Furthermore, you can also use the other angle. If we use 55° instead, the equation would be tan55° = 16/x. The outcome would be the same.

Hope this helps, and Happy Learning! :)

Answer:

1 mile in 15 minutes

Step-by-step explanation:

Simply divide 120  by 8

120/8=15

Answer:

8t

Step-by-step explanation:

c = 4m

m = 2t

c = 4(2t) = 8t

Answer:

2t-4

Step-by-step explanation:

Tom: t.

Max is twice as old as Tom - 2t.

Connie is 4 years younger than Max - 2t-4.

So, Connie is 2t-4 years.

Please mark me as brainliest if you like the answer! :)

========================================================

Explanation:

She saved 10 shots out of 18 total, so that means 18-10 = 8 shots went in.

That forms the ratio 8:10 where we list the amount of shots that went in, followed by a colon, then the amount of shots that were saved. The order is important. From here, we divide both parts of the ratio by 2. The ratio 8:10 fully reduces to 4:5

Effectively, this means that for every 4 shots that went in, there were 5 shots that were blocked.

Answer:

polygon do all the number times each outher divided in half then times 6 for the hight and langht

Step-by-step explanation:

Answer:

$21.60

Step-by-step explanation:

Answer:

Answer is $ 21. 60

Step-by-step explanation:

$22 or 21.60 in decimal form

Step-by-step explanation: $6.00 - 10% is 5.4

5.4 + 5.4 +5.4+5.4 is 21.60

you can also round this off and get the answer as $ 22 .

Hope this answer helps you :)

Have a great day

Mark brainliest

Answer:

312 inches

Step-by-step explanation:

Surface Area = 2×(8×12 + 8×3 + 12×3) = 312 inches

Answer:

312

Step-by-step explanation:

(12x3)x2=72

(12x8)x2=192

(8x3)x2=48

72+192+48=312

Answer:

22.8

Step-by-step explanation:

(18²+14²)½

= 22.8

Answer:

y=-3/2x+3

Step-by-step explanation:

(0,3) and (2,0) tell us that the y intercept is 3 because at x = 0, y = 3.

This leaves the first and last choice only.

We can calculate the slope by 0-3 and 2-0, so -3/2 is the slope

Answer:

area of the right triangle=1/2×7×5

=17.5 square feet

Answer:

Hi, there your answer is 9.5

Median=10

9 + 10 = 19

19 ÷ 2 = 9.5

Step-by-step explanation:

Sorry my bad I forgot to add and divide

Answer:

The median would be 9.5

Step-by-step explanation:

To find our answer we will first put them in numerical order:

3, 5, 7, 8, 8, 9, 10, 10, 10, 11, 12, 15

Now that we have the numbers in order, we will find the middle numbers.  Since the middle numbers are 9 and 10, we will add them both and divide them by 2.

9 + 10 = 19

19 ÷ 2 = 9.5

Therefore 9.5 is our answer!

Answer: The area of the triangle would be “36cm^2”

Explanation: To find the area of a triangle you multiply the height and base and divide it by 2 so it would look like this 18 x 4 = 72 then 72/2 which is 36cm^2.

Have a nice day!

Answer:

Area=36

Step-by-step explanation:

18x4=72

72/2=36

Answer:8x5x3.4= 132 feet squared

Step-by-step explanation:

Answer:

4th July 1776

Step-by-step explanation:

4th July is marked as independence day

Step-by-step explanation:

[tex]\sin^{4}x \: - \cos^{4} x = (\sin^{2}x)^{2} - (\cos^{2}x)^{2} [/tex]

[tex] = (\sin^{2}x)^{2} - (1 - \sin^{2}x)^{2} [/tex]

[tex] = \sin^{4}x - (1 - 2\sin^{2}x + \sin^{4}x)[/tex]

[tex] = 2\sin^{2}x - 1[/tex]

[tex] = - \cos2x[/tex]

Note: I used the identity

[tex] { \sin }^{2} x = \frac{1}{2} (1 - \cos \: 2x)[/tex]

for the last step.

PS. I love proving trigonometric identities!

Answer:

0.1 , 0.2 , 0.05

Step-by-step explanation:

*each column adds to 1*

20 x 1/2 = 10

1/2 x 20 x 0.1 = 1

top left box = 0.1

; 5 x 2 x 0.1 = 1

1/2 x 10 = 5

; 0.2 x 1/2 x 10 = 1

bottom middle box = 0.2

; 5 x 1 x 0.2 = 1

; 2 x 10 x 0.05 = 1

middle right box  = 0.05

; 20 x 1 x 0.05

Answer:

133° because vertically opposite angles are equal!

Hope this helped!