PLZ, QUICKLY IT IS HOMEWORK Two trains leave the same station at the same time, but are headed in opposite directions. One train travels at 70 mph and the other train travels at 80 mph. How long after they leave the station will they be 50 km apart?

Answer:

x-13

Step-by-step explanation:

why you may ask?

subtracted=being taken away from

13 is *being taken away from* x

so if using numbers, 13 is being taken away from 20

or 13 is being subtracted from 20 would be 7, so x-13 would be your expression

Answer:

$8.50, the rate is 9.65%

Step-by-step explanation:

Answer: B. [tex]\frac{1}{4} \pi x^{3}[/tex]

Equation: I found the answer on this link

https://www.dcs.k12.oh.us/cms/lib/OH16000212/Centricity/Domain/277/20140221144149685.pdf

Answer:

C = 20π cm

Step-by-step explanation:

If you want the "exact circumference," use π instead of the usual approximation 3.14 or 3.14159.

Here the circumference is C = 2π(10 cm), or C = 20π cm.

Step-by-step explanation:The slope of AB and BC are the same.

The initial value is 60 m and the slope is 40 m/min.

Step-by-step explanation:

The graph shows the depth, y, in meters, of a shark from the surface of an ocean for a certain amount of time, x, in minutes.

See the graph attached.

Part A : If we consider two right triangles one Δ ABD and Δ BCE, where D(2,100) and E(1,60) points.

Now, those two triangles are similar and hence the slope of line segment AB will be .

Again, the slope of the line segment BC will be

Hence,  and the slope of AB and BC are the same. (Answer)

Part B : From the graph, it is clear that the initial value of the graph is 60 m and it represents that initial position of the shark i.e. at t = 0 min, the shark was at a depth of 60 m from the water surface.

The slope of the graph is 40 means the rate of change of distance from the Ocean surface of the shark with respect to time in minutes will be 40 m per min. (Answer)

Answer:

B 236in³

Step-by-step explanation:

you use the equation

V=πr²h/3

π=PI r=Radius h=height

Sense in this problem they give you diameter instead of radius you want to divide it by 2 to get one half.

so the equation used looks like this:

3.14•5²•9/3=235.5

rounded up is 236in³

Answer:

A.

Step-by-step explanation:

Answer: Hes wrong its 40

Step-by-step explanation:picking 30 made me get an 80

Step-by-step explanation:

So you would have to find the circumference of a circle that is made of 2 of these semi circles. I'm sorry if that doesn't make sense.

1. The diameter is 34mm so using the given formula find the circumference.

2. multiply the perimeter of the semicircle by 5 and you should get your answer.

Hope this helps!

Answer:

267.025mm

Step-by-step explanation:

here you go and 1 semi circle is 53.405

the angles are complementary because they add up to 90° because of the red square. x=20

Step-by-step explanation:

4x-5+15=90

4x+10=90 subtract 10 from each side

then you get left with 4x=80

divide 4 from each side then you get left with x=20 and to check just substitute  20 where x is so 4(20)-5= 80-5=75 +15=90.

Answer:

d

Step-by-step explanation:

im think right

Answer:

D

Step-by-step explanation:

"at least 20" means "20 or more".

That means you need a closed circle at 20 to include 20 and shading to the right of 20 to include greater than 20.

Answer: D

Answer: d

Step-by-step explanation: trust me ok

Answer:

B. or C.

Step-by-step explanation:

- hope this helps

Answer:

B and D

Step-by-step explanation:

If you count all of the dots, you see that the total amount of math books is 12.

Then, look at the column between 2 and 2 2/8. You see that there are 2 books that weigh 2 1/8 pounds.

Therefore, there are 2 out of the 12 books that weigh 2 1/8 pounds.

2/12 can also be simplified down to 1/6.

Answer:

1/ 12 and 5/ 12

Answer:

B. I and IV only

Step-by-step explanation:

You replace the x with the numbers in the parenthesis. So for I it would be:

f(0) = 4(0) - 5  -> 0 - (-5)  -> -5

g(-4) = 3(-4) +7 -> -12 + 7  -> -5

You solve each one and if your answer matches with each other, your answer is right.

If you did this with II and III, you wouldn't get the same answers.

For IV it would be:

f(6) = 4(6) - 5  -> 24 - 5  -> 19

g(4) = 3(4) + 7  -> 12 + 7  -> 19

Answer:

13.5

Step-by-step explanation:

x=1.5

6x^2

6(1.5)^2

6(2.25)

=13.5

Answer:

13.5

Step-by-step explanation:

You plug in 1.5 in the x slot, then you would use PEDMAS to solve and finish it!!

(PEDMAS = parenthesis, exponents, division, multiplication, addition, and subtraction) (it depends on whether division or multiplication comes first the same as addition and subtraction)

Hope this helps!!!

Answer:

area = 120√2 ft² or 169.71 ft²

Step-by-step explanation:

x² = 9² - 3² = 81 - 9 = 72

x = √72 = √(36 x 2) = 6√2 ft or 8.49 ft

area = 1/2(5 + 8)(6√2) = 120√2 ft² or 169.71 ft²

Answer:

x<-1/10

Step-by-step explanation:

7x+2 < -3x+1

+3x +3x

10x+2 < 1

-1 -1

10x+1 < 0

-1 -1

10x < -1

x < -1/10

Answer:

r= 16.65

Step-by-step explanation:

Formula of cone V= 1/3 pi r ^2 h

They give us the volume and height, we just need to find the radius.

85= 1/3 pi r^2 9

1/3 of 9 is 3.

85= 3 pi r^2

divide by 3 on both sides.

28.3= pi r^2

square both sides with calculator or logic and round to nearest tenth.

5.3= pi r

divide pi.

r= 5.3 pi = 16.65

To find volume, plug everything in the formula.

Answer:

Length = 13 in

Width = 10 in

Step-by-step explanation:

Let L be the length.

Let W be te width.

From the question given above, the Lenght is 3 more that the width i.e

L = 3 + W

Next, we shall determine the width (W). This can be obtained as follow:

Length (L) = 3 + W

Width (W) = W

Area (A) = 130 in²

A = L × W

130 = (3 + W) × W

Clear bracket

130 = 3W + W²

Rearrange

W² + 3W – 130 = 0

Solving by formula method

W = –b ± √(b² – 4ac) / 2a

a = 1

b = 3

c = –130

W = –3 ± √(3² – 4 × 1 × –130) / 2 × 1

W = –3 ± √(9 + 520) / 2

W = –3 ± √(529) / 2

W = –3 ± 23 / 2

W = –3 + 23 / 2 or –3 – 23 / 2

W = 20/2 or –26/2

W = 10 or –13

Since measurement can not be negative, the width is 10 in.

Finally, we shall determine the length. This can be obtained as follow:

L = 3 + W

W = 10

L = 3 + 10

L = 13 in

SUMMARY

Length = 13 in

Width = 10 in

Answer:

A, B, C, E, and F

To solve this problem, you should make sure to find the equation first. Start by doing rise/run with your two given points on the graph. From the point (-1,1) you rise 4 and then run 16 over to the point (3,2). That gives us a slope of 4/16 which can then be simplified to 1/4. That means that letter F tells us the equation of the line is y= 1/4x + 5/4.

From there you want to check your points, (3,2) and (-1,1). The first number is always x and the second number is always y. So you plug the point numbers into the equation we just found to see if they work. In the photos I inserted are how to do this step.

Once you have checked your points and you know for sure they're solutions, that gave you letters A and B. Since the point (1, 3/2) is also given in one of the answers we should check that point as well. (Also done in one of the photos) Since the point came out correctly that gives us letter C and also tells us there is more than 2 solutions. This means that letter E is also correct.

Hope this helped!

Answer: A 5

Step-by-step explanation:

20% * 25

= 0.2 * 25

= 5

She can expect to hit the bullseye 5 times.

Answer:

A. 5

Step-by-step explanation:

Regina throws 25 darts and hits the bullseye 20% of the time. So we would set up the equation as 0.20*25 (as we are looking for 20% of 25 and of means multiplication and 20% is 0.20). 0.20*5=5 so she can expect to hit the bullseye 5 times. Therefore, A is the correct answer choice.

Answer:

hey mate.......pls don't attach link.....take screenshot of it

Answer:

!ck+as$

Step-by-step explanation:

U put it in and u win

Answer:

1st row = no

2nd row = yes

3rd row = yes

4th row = yes

Step-by-step explanation:

hope this helps.

ps. I also dislike blank answers.

The research method used might be biased because B. It is likely that student opinions in one particular high school do not accurately represent the opinions of all high school students.

It should be noted that a research simply means an inquiry to understand a topic better.

In this case, the research method used might be biased because it is likely that student opinions in one particular high school do not accurately represent the opinions.

The correct options are B and C.

Learn more about research on:

https://brainly.com/question/968894

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Answer:

B. It is likely that student opinions does not accurately represent the student population

C. Students that take the time to complete the survey and mail it in probably feel strongly about hot lunches.

Step-by-step explanation:

'22 edg

Answer:

B' is (2, 0) and C' is (7, 1)

Step-by-step explanation:

Compare A and A' and you see that you added 2 to X and 5 to Y. Now you simply apply this to B and C to find B' and C'

Answer:

1,928,352 in cubed

Step-by-step explanation:

The volume of the cereal box is [tex]\rm 228\dfrac{3}{4}[/tex]cubic inches.

The volume of rectangular prism is given by :-

[tex]\rm Volume = Length \times Width \times Height[/tex]

Demarcus has a cereal box shaped like a rectangular prism. It measures 7 5/8 inches long, 2 1/2 inches wide, and 12 inches high.

The volume of the cereal box is determined in the following steps given below.

[tex]\rm Volume = Length \times Width \times Height\\\\\rm Volume = 7\dfrac{5}{8}\times 2\dfrac{1}{2} \times 12\\\\\rm Volume = \dfrac{7\times 8+5}{8} \times \dfrac{2\times 2+1}{2} \times 12\\\\\rm Volume = \dfrac{61}{8} \times \dfrac{5}{2} \times 12\\\\Volume =\dfrac{3660}{16}\\\\Volume=228\dfrac{3}{4}[/tex]

Hence, the volume of the cereal box is [tex]\rm 228\dfrac{3}{4}[/tex]cubic inches.

Learn more about prism here;

https://brainly.com/question/3244285

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I think that the answer is C