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DIA [1.3K]
3 years ago
10

Milla and Luka are 3 kilometers apart and walking toward each other. Milla's average speed is 5 kilometers per hour and Luka's i

s 4 kilometers per hour. Which equation can be used to find t, the time it takes for Milla and Luka to meet? 5t + 4t = 1 5t + 4t = 3 5t – 4t = 0 5t – 4t = 3
Mathematics
2 answers:
valentinak56 [21]3 years ago
8 0

Answer:-5t + 4t = 3 is the equation can be used to find t, where t is the time it takes for Milla and Luka to meet


Explanation:-

Given: Milla and Luka are 3 kilometers apart and walking toward each other.

⇒ Distance between them = 3 km

Milla's average speed u=5 kilometers per hour

and Luka's v= 4 kilometers per hour.

Therefore the resultant average speed = u+v=(5+4) kilometers per hour.

We know that <em>Distance =speed × time</em>

⇒Distance between them= resultant average speed × time

⇒3=(5+4)×t        , where t is time  it takes for Milla and Luka to meet

⇒3=5t+4t            [distributive property]

Thus ,  5t + 4t = 3 is the equation can be used to find t, where t is the time it takes for Milla and Luka to meet

pantera1 [17]3 years ago
3 0
It's B 5t+4t=3 thats the original answer
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Step-by-step explanation:

There are certain methods for solving a system of equations. Some of which are:

  • Substitution Method
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<em>Substitution Method</em>

Substitution method to solve a system of equations is suitable if a variable of a any equation seems isolated or could comfortably be isolated without any ration/fraction resulting.

For example, for the following system of equations

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substituting the value of x = 5 - y from equation [B] into equation [A], so that

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<em>Elimination Method</em>

Elimination method to solve a system of equations is suitable if both equation are in standard form, and just adding or subtracting the equations to determine an equation in one variable.

For example, for the following system of equations

2x + 7y = -5....[C]

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Adding Equation [C] and Equation [D].

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<em>Graphing Method</em>

Sometimes graphing method may be used to solve the system of the equation and visualize the solution.

For example,

y = -2....[E]

y = 3x + 1....[F]

The solution for this system of equation is the point of intersection of both the lines, which is shown in attached figure. The point of intersection is (-1, -2).

Hence, the solution of this system of equations is (-1, -2), as shown in attached figure.

<em>Keywords: system of equations, elimination method, substitution method, graphing method</em>

<em>Learn more about solution of system of equations from brainly.com/question/2643311</em>

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6 0
3 years ago
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Answer:

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The roots of the equation are the solution to the quadratic equation and can be seen from the graph at the point where the quadratic equation crosses the x-axis.

The graph crosses the x-axis at two points.

These are at the points x = -3 and x = 1

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= x^2 -x + 3x -3 = x^2 + 2x -3

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