Solve the proportion.
= 
A. 
B. 
C. 
D. 21
Answer: C
Mathematics
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Solve using substitution:
Mathematics
Find the LCD for the fractions in the list.
, 
A. 4a2 - 7 B. 4a(a - 7) C. 4a - 7 D. 4a2 - 28
Mathematics
Complete the factoring.9x2 - 20x - 21 = (x - 3)( )
A. 9x + 7 B. x - 7 C. 7x + 9 D. x + 9
Mathematics
Determine if the given ordered pair is a solution to the system of equations.
(-1, 1)
A. Yes B. No
Mathematics