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24 April, 10:28

1. If x2 = 60, what is the value of x?

A. plus or minus the square root of 30

B. plus or minus the square root of 60

C. plus or minus 30

D. plus or minus 120

2. A square piece of cheese covers eight square inches of a plate. What is the approximate length of one side of the piece of cheese? (Approximate to the nearest hundredth inch.)

A. 2.81 inches

B. 2.82 inches

C. 2.83 inches

D. 2.84 inches

3. Solve x2 = 121.

A. 60.5

B. - 11

C. 11

D. plus or minus 11

+1
Answers (1)
  1. 24 April, 10:51
    0
    Q1, The answer is B. plus or minus the square root of 60

    x ² = 60

    x = ?

    Since a² = - √a or a² = + √a, then

    x = - √60 or

    x = + √60

    Q2. The answer is C. 2.83 inches

    The area of the square (A) with side s is:

    A = s ²

    Since A = 8 in², then s² = 8 in²

    s = √8 in²

    s ≈ 2.828 in

    s ≈ 2.83

    Q3. The answer is D. plus or minus 11

    x² = 121

    x² = 11²

    Since a² = - √a or a² = + √a, then

    x = - √11² or x = + √11²

    x = - 11 or x = + 11
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Home » Mathematics » 1. If x2 = 60, what is the value of x? A. plus or minus the square root of 30 B. plus or minus the square root of 60 C. plus or minus 30 D. plus or minus 120 2. A square piece of cheese covers eight square inches of a plate.
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