Provide an appropriate response.The diagonals of a 
intersect at their common midpoint.
A. trapezoid
B. pentagon
C. parallelogram
D. rhombus
Answer: D
Mathematics
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Solve the problem.Find the sum of the infinite series 1 + 2r + 5r2 + 2r3 + r4 + 2r5 + 5r6 + 2a7 + r8 ... for those values of r for which it converges.
A. 
B. 
C. 
D. 
Mathematics
Graph the solution set of the system of inequalities.
A. 
B. 
C. 
D. 
Mathematics
One root of the equation 
is 0. How many nonzero roots are there?
?
A. 0 B. 5 C. 4 D. 6 E. none of these
Mathematics
Solve.In how many ways can the letters in the word PAYMENT be arranged if the letters are taken 4 at a time?
A. 210 B. 420 C. 28 D. 840
Mathematics