Use an identity to find the value of the expression. Do not use a calculator.sec2 55° - tan2 55°
A. 1
B. 0.30
C. 0.55
D. 0
Answer: A
Mathematics
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Perform the indicated operation.
A. -13
B. -23
C. 13
D. - 
Mathematics
E = 14.4 V and V1 = 12.0 V. Find V2.
a. 14.4 V
b. 12.0 V
c. 7.4 V
d. 6.0 V
e. 2.4 V
Mathematics
Is the ordered pair a solution of the given system of equations?(2, 1), 
A. Yes B. No
Mathematics
Graph the linear equation.y = -3
A. 
B. 
C. 
D. 
Mathematics