Mathematics Middle School

The system of equations relates the distance, y,
from a station of two trains and the speed, x, at which they are moving.
y + 10x = 250
2.5y = -25x + 625
a. What does the system of equations tell you about the speed
of the trains?
b. What does the solution tell about the locations of the trains if they
left the station at the same time? If they left at different times?

Answers

Answer 1

Answer:

a . It is a simultaneous speed.

Related Questions

Regina travels ½ of a kilometer for every ¼ of a minute she drives. You were told that the trip from Times Square to Pelham Parkway is 72 kilometers. How many minutes would her trip have taken by car?

Answers

Answer:

36 minutes.

Step-by-step explanation:

The best way to solve this is to find how much distance is traveled in a minute and then divide the total distance by the distance traveled in a minute. Now let's apply.

1/4 x 4 = 1 minute, so in this problem, 1/2 x 4 = 1 minute.

1/2 x 4 = 2.

72 / 2 = 36.

Her trip would have taken 36 minutes by car.

Answer:

36 minutes.

Step-by-step explanation:

For every mile she takes it's 1/2 of a minute. Then just do 72/2 and get 36 :)

If I invest $600 at an 11.5% interest rate, how much money will I earn over 5 years?
A. $945
B. $345
C. $69
D. $34.50

Answers

Answer:

B. 345

Step-by-step explanation:

Hope this helps!

I think it’s choice b. $345

Packs of pens are $3.5 each with a $6 delivery charge when ordered online.
a. Write an equation to represent the total spent on packs of pens based on the number purchased.
b. Graph the equation.

Answers

Answer:

its A

Step-by-step explanation:

Answer:

aAEDS

Step-by-step explanation:

whats the formula for the surface area of a triangle?

Answers

Answer:

use the formula A = 1/2bh, where A = area, b = base, and h = height. Once you have the areas of all sides and faces, you simply add them together to get the surface area.

Hope this helps!

The formula would be depending on the triangular shape. Triangular prisms have their own formula for finding surface area because they have two triangular faces opposite each other. Which creates the formula A=12bh is used to find the area of the top and bases triangular faces, where A = area, b = base, and h = height.

Pls help only 3 more questions left

Answers

Answer:

the answer would be D

Step-by-step explanation:

since it does not specify how many of each shirts there are, it is possible for it to be any size and color.

Answer:

D

Step-by-step explanation:

R B P Y are just the shirts there are two sizes so 8 possible outcomes

amount of shirts x sizes = outcome

4 x 2 = 8

please help ill give brainliest

Answers

Answer:

26.25

Step-by-step explanation:

I'm pretty sure this is the correct answer.

The Buffaloes won 57.1% of their 140 baseball games this year. How many games did they win?
A) 60
B) 70
C) 80
D) 90

Answers

Answer:

C - 80 games

Step-by-step explanation:

140 * 0.571 ≈ 80

C is the correct solution A, B, and D are incorrect

The perimeter of a rectangular garden is 37.5 feet. The width is x, and the length is 15 ft. Use the equation 2(x + 15) = 37.5 to determine the width, in feet, of the garden?

Answers

Answer:

2.5

Step-by-step explanation:

37.5/15=2.5

Answer:

11.25

Step-by-step explanation:

first what u do is u just make 2(x+15)=37.5 into 2x+15=37.5

and then u do 2x=37.5-15

that will give u 2x=22.5

then u do this x=22.5/2

and x = to 11.25

Which equation has a slope of 1/2 and y-intercept of -5

A. 2x + y = -5
B. 2x - y = 5
C. x + 2y = -10
D. x - 2y = 10

Answers

The answer is D
x-2y = 10
Yes if I remember from last year it was D but don’t quote me on that

A car rental company's fees are shown. Suppose you rent a car using Option 2. Write an expression that gives the total cost in dollars for driving m miles. Then find the cost for driving 150 miles.

Option 1 - $19.99 per day, $0.17 per mi.

Option 2 - $50 fee, $0.17 per mi

Answers

Answer:

Step-by-step explanation:

.17M+50

Write an inequality for each situation.
1. up to 5 people, p, visited Mary today
2. the value, v, of the hat is less than $9
3. the number of guests, g, coming for dinner is not 8.
4. the distance of the race, d , is at least 6 miles.
5. the time it takes to get to grandmas house, t, is longer than 2 hours.
PLS HELP I NEED IT FOR TODAY

Answers

Answer:

1. p <= 5

2. v < 9

3. g != 8

4. d >= 6

5. t > 20

Step-by-step explanation:

<= is "less than or equal to"

!= is "not equal to"

>= is "greater than or equal to"

A restaurant is selling 3 smoothies for $9.

How much do 15 smoothies cost?

Number of smoothies Cost in dollars

3 9

15 ? ( Zearn)

Answers

45
to find the answer just find the unit price by dividing 9 by 3, that gives you 3.
that means each smoothie is 3 dollars, then just times by 15! :)

PLS HURRY

The equation 9t = 27.99 models a constant rate situation.



Drag and drop the value of 5t in the box. 5t=

Answers

Answer:

The value of 5t will be 15.55

Step-by-step explanation:

Given equation is;

9t = 27.99

As it is stated that the relationship is constant, therefore, we will find the value of t by dividing 27.99 by 9

Now, we will put t=3.11 to find 5t.

The value of 5t will be 15.55

the value is 15.55
if you need an explanation just ask

i just need help because i dont understand it

Answers

Answer:

8

Step-by-step explanation:

2 times 4 is 8

Answer:

25square units

Step-by-step explanation:

you have to find the area of the blue square. First you have to find the side length of the square. the missing length is called the hypotenuse because it is the longest side of the triangle. It is probably 5 units, because in comparison the the 4 units it looks about 1 unit longer. now all that's left is 5x5=25

Please do them all start with number 2 please epscify what problem is the answer MULTIPLE PAGES I LITTERLY. SWEAR DOOD NOBODY DOES THE OTHER PAGES-

Answers

Answer:

Q2: 2x+5=15

Q3: 35x+7=63

Q4: 2t+3=39

Q5: x/5-2=7

I haven't got a clue on how to do the last three but I hope these four help!

Mr. Green washed
1
4
of his laundry. His son washed
2
5
of it. How much of the laundry still needs to be washed?

(Need the answer to be in fractions)

Answers

Answer:

What was the original number??

Step-by-step explanation:

The answer is 7/20 still needs to be washed. Hope this helped!! :)

You call your teacher and find out that the second part of the note should have said “sell four hot dogs and two bags of chips for $10.” What does that do for your system of equations now? With this new information, how much should each item cost? Again, show all of your work.

Answers

Answer:

h = $4 a hotdog

c = $2 bag of chips

Step-by-step explanation:

3h + c = 14

2h + c = 10

3h + c = 14

-2h - c = -10

h = $4 a hotdog

2(4) + c = 10

8 + c = 10

c = $2 bag of chips

Answer:

h = $4 a hotdog

c = $2 bag of chips

Step-by-step explanation

3h + c = 14

2h + c = 10

3h + c = 14

-2h - c = -10

h = $4 a hotdog

2(4) + c = 10

8 + c = 10

c = $2 bag of chips

Find the slope of the line that passes through the points (-6, -2) and (-7, -2)

Answers

(-6, -2)/(-7, -2)
y-y/x-x
(-2- -6)/(-2- -7)
(-2+6)/(-2+7)
4/5 = slope
I’m pretty sure the slope is 0

Please help ASAP thank you!

Answers

Answer:

Step-by-step explanation:

Perimeter=((4-1)+(-2-(-4)))2

               =10

Answer:

Perimeter=((4-1)+(-2-(-4)))2 =10

Step-by-step explanation:

may i pls have brainliest

p.s i agree with the guy below/ or above me

Solve: y + x = 3
y = 1.5x + 1
Solve: y = 1.4x + 2
y = 3.4x - 2

Answers

I hope that this help 1) x=0.8 2)x=2

I don't understand this- (math is my really WEAK point :') )

Answers

Answer:

A. 1/10

Step-by-step explanation:

You have to switch the operations for division to multipliation

Which is the net of this solid?

A pentagonal pyramid is shown.(image below)

A net is shown with a square in the middle and 4 identical triangles on the 4 sides of the square.
A net is shown with a pentagon in the middle and 5 identical triangles on the 5 sides of the pentagon.
A net is shown with a triangle in the middle and 3 identical triangles on the 3 sides of the triangle in the middle.
A net is shown with a hexagon in the middle and 6 identical triangles on the 6 sides of the hexagon.

first image is the pentagonal pyramid, second image is a, last image is d.

Answers

Answer:

The answer is letter A.

It’s Anwser is going to be A

A large bottle of juice contains 500 milliliters of juice. A small bottle contains 50% as much juice as the large bottle. How many milliliters of juice are in the small bottle?

Answers

Answer:

250 milliliters of juice.

Step-by-step explanation:

You need to find 50% of 500. What I like to do in this situation is turn it into a basic division problem:

500 ÷ 2

500 divided by 2 is 250.

please help me thank you sooooo much ( also if you take my points
I'm reporting you)

Answers

Answer: x=-10.2 but for me the real answer is x=10.2 but go for x=-10.2

Step-by-step explanation: hope this help

Answer:

10.2 is the answer

Step-by-step explanation:

when u divide you get it.

-3x + 1 < 7 on number line

Answers

Answer:

D.    x is greater than -2

Step-by-step explanation:

Ok so,

-3x + 1 < 7

First, do the opposite of +1 which is -1 so you have to subtract 1 from both sides. Which should look like this.

-3x < 6

Then you divide -3 with 6 which will give you -2. You change the inequality sign becuase you divided with a - number.

Hope his helps. Have a good day!

URGENT AGAIN
John's salary last year was $80000. Last year he got a raise of 10%. This year
the company lost money and his salary was cut back to S80000 By what percent did
his salary decrease this year?

Answers

Answer:

so I dont think that my answer is right but since his salary was 80000 last year but he got a raise of 10% then he got 8000 more so then he got 88000 in total but then they took away $80000 so I think they took away 90%

It is 10%, since his salary came back to what it was before the raise.

Write a real world problem involving multiplication by a decimal factor.Then solve the problem. Write the real world problem and solve

Answers

Sample question:

Aimee bought 2 CDs each costing $11.95 and 3 CDs each costing $6.48. She paid with a $50 note. How much change did she receive?

Answer:

2 × 11.95 = 23.9

3 × 6.48 = 19.44

Total spent = 23.9 + 19.44 = 43.34

Change = 50 - 43.34 = $6.66

Answer:

if an article was bought by Amina for 2Kobo and John bought articles for 8Kobo how many articles did John buy?

1 a=2k

x a=8k

cross multiply

8k × 1 = 2k × x

8k=2k

4k

You and your friends go out to dinner. At the end of the meal, you and your friends want to leave a 20% tip of $66.36. What was the cost of the meal? Round to the nearest cent if necessary.

Answers

Answer:

76.36 Hope this helps

75.56 is the answer your welcome

Factor 25x2+40x+16 completely.
Enter your answer by filling in the boxes.
25x2+40x+16 = ([]x+[])²

Answers

(5x+4)^2 because 5x times 5x is 25x^2 then 20x+20x equals 40x and 4 times 4 equals 16

Answer:

(5x+4)²

Step-by-step explanation:

Use the quadratic formula to solve

Can you help me graph this system of inequalities. And give the coordinates for the set.

Answers

Answer:

Here I made a yt vid to explain

Step-by-step explanation:

NEVER GONNA GIVE YOU UP

Use Desmos Graphing Calculator
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