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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

Respuesta :

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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