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Which point is (\frac{5}{2}) units to the right of (-3) on the number line?

Answer and explanation

Correct answer: (-\frac{1}{2})

The direct answer is option A, \(-\frac12\). On a number line, moving to the right means adding a positive distance. Starting at \(-3\) and moving \(\frac52\) units right gives \(-3+\frac52\). Write \(-3\) as \(-\frac62\), so \(-\frac62+\frac52=-\frac12\). Option A is therefore correct. Option B, \(-\frac{11}{2}\), results from moving left by \(\frac52\), because it is \(-3-\frac52\). Option C, \(\frac12\), would be obtained by adding \(\frac72\), not \(\frac52\), so it is too far to the right. Option D, \(-\frac52\), does not represent the stated movement; it is only one-half unit to the right of \(-3\). The sign direction is the key idea: right means addition and left means subtraction. A quick check is that moving 2.5 units right from -3 should leave the point still slightly negative, exactly \(-0.5\).

Related tags

PolynomialsNumber-LineRight-ShiftMedium

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