Simplify the expression.
A. 25
B. 5
C. 8.368
D. not a real number
Answer: B
Mathematics
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Transform the equation by rotating the axes through the given angle. Identify the curve.31x2 + 10
xy + 21y2 - 144 = 0, ? = 30°
A. 
+ 
= 1; ellipse
B. 
+ 
= 1; ellipse
C. y'2 = -4
x'; parabola
D. x'2 = -4
y'; parabola
Mathematics
Provide an appropriate response.Multiply and simplify: (2t - 5)(2t + 5)
What will be an ideal response?
Mathematics
Find the perimeter. 
A. 214 ft B. 216 ft C. 219 ft D. 222 ft
Mathematics
Simplify.0 ÷ 9 + 7 × 2
A. Undefined B. 23 C. 32 D. 14
Mathematics