Answer the question.A quadrilateral is a 
if and only if its diagonals are perpendicular.
Fill in the blank(s) with the appropriate word(s).
rhombus
Mathematics
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Perform the operation. Write the answer as a fraction in lowest terms.31
- 12
A. 
B. 19
C. 
D. 172
Mathematics
Evaluate the sum.
6k
A. -55,987 B. 55,985 C. 39,955 D. -39,991
Mathematics
Solve the system by substitution. -4x + 8y = 56 x + 7y = 49
A. No solution B. (0, 7) C. (1, 6) D. (-7, 0)
Mathematics
Find all real and complex zeros of P(x) = x³ -2x² -6x -8.
What will be an ideal response?
Mathematics