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If x on the number line satisfies -√50 < x < -7, which value is possible?

Answer and explanation

Correct answer: -7.05

The governing concept is comparison of negative real numbers within an inequality. First, √50 = 5√2 ≈ 7.071, so -√50 ≈ -7.071. The condition therefore requires x to be greater than -7.071 but less than -7; in interval notation, x must belong to approximately (-7.071, -7). The value -7.05 lies inside this narrow interval, so option A is possible. The value -7.20 is less than -7.071 and lies outside on the left. The value -6.90 is greater than -7, and -8.00 is also smaller than the left endpoint. Because negative numbers increase when they move rightward on the number line, careful order checking is essential.

Related tags

Number-LineInequalityNegative-NumbersSquare-RootRepresenting Real Numbers On The Number LinePolynomialsMathematicsClass 10 Mcq

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