Find the unknown number in the proportion. Write your answer as a whole number or a mixed number if possible.
= 
A. 64
B. 1
C. 49
D. 7
Answer: B
Mathematics
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Decide whether or not the given equation is an identity.csc2x sec2x = sec2x + csc2x
A. Yes B. No
Mathematics
Provide an appropriate response.Change 
to a repeating decimal.
A. 0.77777778
B. 0.77777777
C. 0.
D. 
Mathematics
Give a geometric description of the set of points whose coordinates satisfy the given conditions.x2 + y2 ? 9, z = 5
A. All points on or outside of the circle x2 + y2 = 9 and in the plane z = 5 B. All points within the parabola x2 + y2 = 9 in the plane z = 5 C. All points on or within the circle x2 + y2 = 9 and in the plane z = 5 D. All points on the cylinder with radius 3 along the z-axis
Mathematics
Solve for x.
= 6
A. 3 B. 9 C. -3 D. -9
Mathematics