Solve the problem.How many rectangles are in a figure made by 6 square tiles lined up in a row? Use the pattern below to solve.
A. 15
B. 13
C. 23
D. 21
Answer: D
Mathematics
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Solve the problem.Calculate the redundancy of the following network. 
A. 3 B. 2 C. 7 D. 4 E. 6
Mathematics
Fill in the blank with one of the words or phrases listed below. 
is a measure of the amount of substance in an object. This measure does not change.
A. Mass B. Weight C. Volume D. Area
Mathematics
Solve by completing the square.49b2 + 42b + 8 = 0
A. - 
, - 
B. 
, 
C. - 
, - 
D. - 
, 
Mathematics
Without solving, determine the character of the solutions of the equation.f
= x2 - 3x + 7
A. a repeated real solution B. two complex solutions that are conjugates of each other C. two unequal real solutions
Mathematics