Answer:
12.
Step-by-step explanation:
Answer:
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Step-by-step explanation:
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- The coordinates of a point satisfies the equation of a line if the point lies on the line
- If a single point satisfies the equations of two lines, the point is on both lines, so the lines will intersect at that point.
- This means that each point where the two lines touch is a solution to the system of equations
- This means that if you substitute the x and y values of the point for x and y in the equations, both equations will be true
<h2>
Explanation:</h2>
You haven't given any option. However, I have tried to complete this question according to what we know about system of linear equations. Suppose you have the following system of two linear equations in two variables:

The fist equation is the blue one and the second equation is the red one. Both have been plotted in the first figure below. As you can see, (-3, -3) is the point of intersection and lies on both lines. So this point is a solution of the system of equation and we can also say that it touches both lines. On the other hand, if you substitute the x and y values of the point for x and y in the equations, both equations will be true, that is:

Also, you can have a system with infinitely many solutions as the following:

Here, every point that is solution of the first equation is solution of the second one. That is because both equations are basically the same. If we divide eq (2) by 2, then we get eq (1).
<h2>Learn more:</h2>
System of linear equations in real life problems: brainly.com/question/10412788
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Answer: 4x+15≥20
Step-by-step explanation:
To find the inequality, we can break down the sentence.
The first part says the sum of a number times 4 and 15. Let's split this apart. We begin with "the sum of". This tells us that we will be adding two things together. The first is a number times 4 and the second is 15. Let's use x for the unknown number. Therefore we would have 4x+15.
The last part is at least 20. This means the sum has to be 20 minimum. So the inequality we use should be greater than or equal to.
Therefore, the inequality is 4x+15≥20.
Answer:
182 miles
Step-by-step explanation:
52 times 3.5=182