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Gnom [1K]
3 years ago
7

X and Y are two stations which are 320 miles apart. A train starts at a certain time from X and travels towards Y at 70 mph. Aft

er 2 hours, another train starts from Y and travels towards X at 20 mph. At what time do they meet?
Mathematics
2 answers:
Citrus2011 [14]3 years ago
8 0

Answer:

16

Step-by-step explanation:

Miles

Svetllana [295]3 years ago
4 0

Answer:

hehe sheik dot e ru o Jr ti on g

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Archy [21]
The answer is 5.5!!!!
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2 years ago
Write an algebraic equation to represent the problem:
Alex73 [517]

Answer:

20%

Step-by-step explanation:

That’s because 3/15 = 1/5, which is 20%

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Read 2 more answers
Jeanne babysits for $6 per hour. She also works as a reading tutor for $10 per hour. She is only allowed to work 20 hours per we
Ksenya-84 [330]

<u>Part a)</u> Use a system of inequalities to model the scenario

Let

x-------> represent babysitting hours

y-------> represent tutoring hours  

we know that

x+y \leq20 --------> inequality 1  

6x+10y \geq 75 --------> inequality 2

<u>Part b)</u> Use the model created in part A to create a graph representing Jeanne’s probable income earned and possible number of hours worked this week

we know that

x+y \leq20 --------> inequality 1

This inequality represent Jeanne’s possible number of hours worked this week

Using a graph tool

the solution of this inequality is the shaded area

see the attached figure N 1

6x+10y \geq 75 --------> inequality 2  

This inequality represent Jeanne’s probable income earned this week

Using a graph tool

the solution of this inequality is the shaded area

see the attached figure N 2

<u>Part c)</u> Analyze the set of coordinate values that represent solutions for the model created in part A. Choose one of the coordinates within the solution and algebraically prove that the coordinate represents a true solution for the model

we have the system of inequalities

x+y \leq20 --------> inequality 1

6x+10y \geq 75 --------> inequality 2

the solution of the system of inequalities is the shaded area

using a graph tool

see the attached figure N  3

Let

A(10,10) ------> see the attached figure N  3

The point belongs to the shaded area, so it is a system solution.

If the point is a solution, it must satisfy both inequalities.

<u>Prove algebraically </u>

A(10,10)

substitute the value of x and y in the inequalities

<u>inequality 1</u>

10+10 \leq20

20 \leq20 ------> is ok

<u>inequality 2</u>

6*10+10*10 \geq 75

160 \geq 75 -------> is ok

the point A satisfy both inequalities

therefore

the point A is a solution of the system

7 0
3 years ago
A skull cleaning factory cleans animal skulls of​ deer, buffalo and other types of animals using​ flesh-eating beetles. The fact
Strike441 [17]

Answer:

t = 270.36 days

Step-by-step explanation:

hope this helps

8 0
2 years ago
An article is reduced by 12% find the sales price of an article is the normal price is 20,000​
nydimaria [60]

Answer:

The sales price is $19,976

Step-by-step explanation:

12 percent of 20000 is 24. 20000-24=19976

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2 years ago
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