Solve the problem using your calculator.The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands). Use a graphing calculator to model the data with a linear function that predicts the number of products sold as a function of the cost of advertising.
A. y = -26.4 - 1.42x
B. y = 55.8 + 2.79x
C. y = 26.4 + 1.42x
D. y = 55.8 - 2.79x
Answer: B
Mathematics
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Decide whether or not the ordered pair is a solution to the equation.y = 2x; (2, 4)
A. No B. Yes
Mathematics
Perform each operation in proper order.4 × 14 - 49 ÷ 7 + 42
A. 79 B. 65 C. -4 D. 256
Mathematics
How much more interest could $300 earn in 10 years, compounded semiannually (two times a year), if the annual interest rate were 7% instead of 6%? ? Assume that there are no deposits or withdrawals and round to the nearest cent. ? ?
A. $20.38 B. $56.27 C. $92.34 D. $198.76 E. $55.10
Mathematics
Use the given information to find the exact value of the expression.sin ? = 
, ? lies in quadrant II, and cos ? = 
, ? lies in quadrant I
Find cos (? - ?).
A. 
B. 
C. 
D. 
Mathematics