To determine the range of numbers that are within of , we set up the inequality
This inequality means that can be at most away from .
Write the inequality without absolute value:
Next, add to each part of the inequality to solve for :
Convert to fraction form for ease of computation: .
Express and with a common denominator. The common denominator for and is :
Now compute the lower bound:
Compute the upper bound:
Thus, the range of numbers is from to .
Comparing with the provided options, the correct one is:
J. to .
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The Deep Dive
To find the range of numbers within 1.5 of the number , we start by converting into a decimal, which is approximately 0.67. Adding and subtracting 1.5 from this gives us the range:
Thus, the range extends from to , so G is the correct choice.
Choosing an option that gives us a better visual of this range in the number line is also useful! You can think of it as a span that captures all the values from the left extreme, , to the right extreme, , encasing the cozy spot around . It helps in understanding how far out you can go while staying “close” to that middle number!