Multiply and simplify.12 ? 
A. 
B. 
C. 1
D. 144
Answer: C
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Show that the curves are orthogonal.y2 + x2 = 1 and xy = 2
What will be an ideal response?
Solve the initial value problem.
= - 
cos 
?, r(0) = -6
A. r = -sin 
? - 6
B. r = cos 
? - 7
C. r = sin 
? - 6
D. r = - 
sin 
? - 6
Use the distributive property to multiply. Then, if possible, simplify the resulting expression.3(7 + m)
A. 21m B. 21 + m C. 21 + 7m D. 21 + 3m
Provide an appropriate response.A set of data consists of the number of years that applicants for foreign service jobs have studied German and the grades that they receive in a proficiency test in that language. The following linear model is obtained: 
where x represents number of years of study and y represents grade in test. What does the slope of the model represent in terms of the grades on the test?
What will be an ideal response?