Answered

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

Aplus or minus the square root of 30
Bplus or minus the square root of 60
Cplus or minus 30
Dplus or minus 120

  1. 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.)
A2.81 inches
B2.82 inches
C2.83 inches
D2.84 inches

  1. Solve x2 = 121.
A60.5
B-11
C11
Dplus or minus 11

Verified Answer :

JcAlmighty

Q1, The answer is B. plus or minus the square root of 60

x² = 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 = s²
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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