Decide whether the expression is or is not an identity.cot (? + x) = cot x
A. Identity
B. Not an identity
Answer: A
Mathematics
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Solve the equation using the quadratic formula.25x2 + 35x = -12
A. 
B. 
C. 
D. 
Mathematics
Multiply or divide measurement numbers, rounding to the correct precision.43 mi/hr × 2.6 hr
A. 118.2 mi B. 112 mi C. 112.8 mi D. 111.8 mi
Mathematics
Use the appropriate identity to find the indicated function value. Rationalize the denominator, if applicable. If the given value is a decimal, round your answer to three decimal places.tan ?, if cot ? = - 
A. 
B. - 
C. 
D. - 
Mathematics
Perform the indicated operation. Simplify the result, if possible.
+ 
A. 
B. 
C. 
D. 
Mathematics