Determine whether the equation is linear in x.4x + 7 = 0.4
A. Yes
B. No
Answer: A
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Solve the problem.Find the equation for the tangent plane to the surface 
at the point 
A. -5x + 8y + 4z = 7 B. -5x - 8y + 8z = 7 C. -5x - 8y + 8z = -5 D. -5x + 8y + 4z = -5
Evaluate.(-1)15
A. 15 B. -15 C. 1 D. -1
Solve the problem.An electric company has the following rate schedule for electricity usage in single-family residences:Monthly service charge $4.93Per kilowatt service charge1st 300 kilowatts$0.11589/kWOver 300 kilowatts$0.13321/kWWhat is the charge for using 300 kilowatts in one month?What is the charge for using 375 kilowatts in one month?Construct a function that gives the monthly charge C for x kilowatts of electricity.
What will be an ideal response?
Provide an appropriate response.State the range of the inverse cosine function.
A. [-1, 1]
B. (-?, ?)
C. 
D. 