Solve the system of equations.
A. x = 2 - z
y = z + 2
z = any real number
B. inconsistent (no solution)
C. x = z + 2
y = 2 - z
z = any real number
D. x = z + 2
y = z - 2
z = any real number
Answer: C
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Find the exact number of days from the first date to the second. Assume that the second month is in the following year, and assume no leap years.April 24 to February 22
A. 304 days B. 290 days C. 303 days D. 305 days
Provide an appropriate response.The demand function for an appliance company's line of washing machines is 
where p is the price (in dollars) per unit when q units are demanded (per week) by consumers. Find the level of production that will maximize the manufacturer's total revenue, and determine this revenue.
What will be an ideal response?
With your calculator set to radian mode and polar graphics capability, graph the following function in the window specified.r = 1 + 2 cos ?, 0 ? ? ? 2?, [-4, 4] by [-4, 4]
A. 
B. 
C. 
D. 
Use properties of logarithms to condense the logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions.
[5ln (x + 3) - ln x - ln (x2 - 1)]
A. ln 
B. ln 
C. ln 
D. ln 