Find the number.Nine times the sum of a number and -243 gives -54.
A. -249
B. 21
C. 237
D. -33
Answer: C
Mathematics
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Find the exact value.Given that tan ? = 
with ? in quadrant I, find cos 2?.
A. 
B. - 
C. - 
D. 
Mathematics
Solve by the method of elimination by substitution.7x + 3y = -362x + 9y = 6
A. x = 6, y = 2 B. x = -12, y = 4 C. x = -6, y = 2 D. Inconsistent
Mathematics
Decide whether the expression is or is not an identity.csc2 
tan 
= csc x
A. Not an identity B. Identity
Mathematics
Determine whether or not the relationship shown in the table is a function.
Does the table define y as a function of x?
A. Yes B. No
Mathematics