Solve the equation. State whether the equation is a contradiction, an identity, or a conditional equation.
= 
A. {49}; conditional equation
B. {-10}; conditional equation
C. all real numbers; identity
D. ? or { }; contradiction
Answer: D
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Solve the problem.Find the tangent to y = cot x at x = 
.
A. y = 2x - 
+ 1
B. y = -2x + 
C. y = 2x + 1
D. y = -2x + 
+ 1
Collect like terms and write in descending order.4x8 + 2x2 + 6x8
A. 12x2 B. 10x8 + 2x2 C. 12x18 D. Can't be simplified
Evaluate the expression.(-4)-1
A. -4
B. - 
C. 
D. 4
Solve the problem using your calculator.The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test. Use linear regression to find a linear function that predicts a student's score as a function of the number of hours he or she studied.
A. y = -67.3 + 1.07x B. y = 33.7 - 2.14x C. y = 33.7 +2.14x D. y = 67.3 + 1.07x