Solve the system by substitution. If the system is inconsistent or dependent, say so.
A. (4, 4)
B. infinite number of solutions of the equation y - 6x = 4; dependent system
C. (2, -4)
D. empty set solution; inconsistent system
Answer: B
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Solve the problem.Coffee is best enjoyed at a temperature of 125°F. A restaurant owner wants to discover the temperature T at which he should serve his coffee so that it will have cooled to this ideal temperature in 4 minutes. He discovers that a cup of coffee served at 195°F cools to 180°F in one minute when his restaurant is at 74°F. If he maintains the restaurant temperature at 74°F, at what temperature should he serve the coffee to meet his goal?
A. 195°F B. 181°F C. 161°F D. 156°F
Determine the slope and the y-intercept of the graph of the equation.x + y + 5 = 0
A. m = -1; (0, -5) B. m = 1; (0, -5) C. m = -1; (0, 5) D. m = 0; (0, -5)
The graph of a function is given. Decide whether it is even, odd, or neither.
A. even B. odd C. neither
Solve the equation using the quadratic formula.4x2 = -12x - 4
A. 
B. 
C. 
D. 