Solve the problem.The monthly sales volume y (in thousands of dollars) is related to monthly advertising expenditures x (in thousands of dollars) according to the equation 
Spending how much money on advertising will result in sales of at least $50,000 per month?
A. At least $5000
B. At least $7500
C. Between $5000 and $10,000
D. At least $10,000
Answer: D
Mathematics
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Provide an appropriate response. Find the equation of the line that is normal to the line x - 2y = 5 and passes through the point (-4, -7). Write the equation in standard form.
A. 2x + y = 1 B. x - 2y = 10 C. 2x - y = -1 D. 2x + y = -15
Mathematics
Simplify the fraction by dividing the numerator by the denominator.- 
A. 1 B. Undefined C. -1 D. 0
Mathematics
Solve the equation.1 - 
= 
A. 
B. 
C. 
D. 
Mathematics
Find the exact value of the trigonometric expression without the use of a calculator.If tan ? = 
, ? < ? < 
and cos ? = - 
, 
< ? < ?, find the exact value of tan (? + ?).
A. - 
B. 
C. 
D. 
Mathematics