Solve.Find an equivalent expression for cos 3x in terms of powers of cos x.
A. 2 cos3 x + 3 cos x
B. 9 cos x
C. 4 cos2 x - 3 cos x
D. 4 cos3 x - 3 cos x
Answer: D
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Write a fraction to represent the shaded part of the object.
A. 
B. 
C. 
D. 
Pick which graph satisfies the given conditions.Degree 3 with turning points at (-2, 10) and (1, -17).
A. 
B. 
C. 
D. 
Provide an appropriate response.Explain how to subtract rational expressions with different denominators.
What will be an ideal response?
Doris invested some money at 7% and some money at 8%. She invested $4,000 more at 8% than she did at 7%. Her total yearly interest from the two investments was $920. How much did Doris invest at each rate?
A. $100 at 7%, $7,900 at 8% B. $5,000 at 7%, $8,000 at 8% C. $4,000 at 7%, $9,000 at 8% D. $4,000 at 7%, $8,000 at 8% E. $4,500 at 7%, $7,500 at 8%