Soru
Two different points on a number line are both 3 units from the point with coordinate -4 . The solution to which of the following equations gives the coordinates of both points? A) vert x+4vert =3 B) vert x-4vert =3 C) vert x+3vert =4 D) vert x-3vert =4 A B C D
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4.3
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Sarp
Elit · 8 yıl öğretmeni
Uzman doğrulaması
Cevap
To find the coordinates of the two points that are 3 units away from the point with coordinate -4, we can use the absolute value equation.The absolute value of a number represents its distance from zero on the number line. Therefore, the absolute value of the difference between a point and -4 will give us the distance between that point and -4.Let's analyze each option:A)
This equation represents the distance between a point and -4 being equal to 3 units. Solving this equation, we get:
or
Solving for x, we get:
or
So, the coordinates of the two points are -1 and -7.B)
This equation does not represent the distance between a point and -4 being equal to 3 units. It represents the distance between a point and 4 being equal to 3 units.C)
This equation does not represent the distance between a point and -4 being equal to 3 units. It represents the distance between a point and -3 being equal to 4 units.D)
This equation does not represent the distance between a point and -4 being equal to 3 units. It represents the distance between a point and 3 being equal to 4 units.Therefore, the correct answer is A)
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