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mr Goodwill [35]
4 years ago
8

What is the solution to the system of equations below?

Mathematics
2 answers:
sergij07 [2.7K]4 years ago
6 0
D) because the first equation*3-the second equation*;
the left side=0, the right side = 36
eimsori [14]4 years ago
6 0
4x - 7y = -2....multiply by -3
12x - 21y = -42
------------------
-12x + 21y = 6 (result of multiplying by -3)
12x - 21y = -42
----------------add
0 = - 36 (incorrect)
This system has no solution <=
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Vaimiti walks at a constant pace of 1.1 m/s and takes 25 minutes to get to school.
Temka [501]

Solution:

<u>Note that:</u>

  • Speed = Distance/Time
  • Vaimiti speed = 1.1 m/s
  • Jabril speed = 1.3 m/s

<u>Converting the time (minutes to seconds) for Vaimiti to reach school:</u>

  • Vaimiti's time to reach school: 25 minutes = 25 x 60 seconds
  • => Vaimiti's time to reach school: 1500 seconds

<u>Converting the time (minutes to seconds) for Jabril to reach school:</u>

  • Jabril's time to reach school: 30 minutes = 30 x 60 seconds
  • => Jabril's time to reach school: 1800 seconds

<u>Finding the distance of Vaimiti:</u>

  • Speed = Distance/Time

Important: <em>The distance will be in meters since the speed units is </em><u><em>meters</em></u><em>/seconds.</em>

  • => 1.1 meters/second = Distance/1500
  • => 1.1 x 1500 = Distance
  • => 1650 meters = Distance (In meters)

<u>Finding the distance of Jabril:</u>

  • Speed = Distance/Time

Important: <em>The distance will be in meters since the speed units is </em><u><em>meters</em></u><em>/seconds.</em>

  • 1.3 meters/second = Distance (In meters)/1800 seconds
  • => 1.3 x 1800 = Distance (In meters)
  • => 2340 meters = Distance (In meters)

This can lead to two possible solutions:

Possible solution #1:

<u>Finding the difference between the two distances:</u>

  • 2340 meters - 1650 meters = Difference (In meters)
  • => 690 meters

Possible solution #2:

The difference between the <u>distances they walked</u> is that Jabril walked <u>faster</u> than Vaimiti, but Vaimiti reached <u>school</u> earlier than Jabril because the <u>walking distance</u> for Vaimiti is less than the <u>walking</u> <u>distance</u> for Jabril.

Hoped this helped!

6 0
3 years ago
Read 2 more answers
2W+3=78. (What does 'W' equal?)
zhenek [66]
Subtract 3 from 28 to get 75. Then since 2w symbolizes multiplication you do the opposite, you divide 75 by 2 to get 37.5. So w=37.5
5 0
3 years ago
Which of the following equations represents a line that passes through the points
Ksivusya [100]

Step-by-step explanation:

the slope = (0+15)/(-1-4)=15/(-5)= -3

the Equation :

y+15= -3(x-4)

or

y+15 = -3x+12

y +3x=12-15

3x + y = -3

so, the correct answer is II only

5 0
3 years ago
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Please help me with this
Andre45 [30]
Your answer will be 69 people

7 0
3 years ago
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Answer:

The constant term is 6

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