Show that the equation is not an identity by finding a value of x for which both sides are defined but not equal.cos 5x + cos 12x = 2 cos 7x cos x
A. 2?
B. -2?
C. 
D. 0
Answer: C
Mathematics
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Provide an appropriate response.What does the graph of the equation 
look like?
A. The yz-plane B. The xz-plane C. The y-axis D. The x-axis
Mathematics
Identify the terms of the polynomial expression.-4t - 2z
A. -4t and -2z B. 4t and 2z C. 4t and -2z D. -4t and 2z
Mathematics
Determine whether the graph is the graph of a function.
A. Function B. Not a function
Mathematics
Solve the problem.A student takes out two loans totaling $12,000 to help pay for college expenses. One loan is at 4% simple interest, and the other is at 10% simple interest. The first-year interest is 
. Find the amount of the loan at 10%.
A. $200 B. $2000 C. $10,000 D. $400
Mathematics