Use the method of writing each premise in symbols in order to arrive at a valid conclusion.If it's not Saturday, then Dad will shave.If Dad has whiskers, then he did not shave.If it's Saturday, then Dad will take us to the game.Therefore, ...
A. If Dad has whiskers, then he will take us to the game.
B. If Dad did not shave, then he has whiskers.
C. If Dad shaves, then it's not Saturday.
D. If Dad takes us to the game, then he has whiskers.
Answer: A
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The speed of sound in air depends on the temperature. When the temperature is 32 degrees Fahrenheit, the speed 
of sound is 1087.5 feet per second. The average rate of change for ?S is 1.1 feet per second per degree Fahrenheit. Use these facts to estimate the speed of sound in air when the temperature is 59 degrees Fahrenheit.
?
A. 1088.6 feet per second B. 1097.5 feet per second C. 1117.20 feet per second D. none of the above
Multiply.(x - 4)(x + 1)(-3x - 2)
A. -3x3 - 7x2 - 18x + 8 B. -3x3 + 8 C. -3x3 + 7x2 + 18x + 8 D. -3x3 + 18x2 + 7x + 8
In testing an engine, various mixtures of gasoline and methanol are being tried. How much of a 45% gasoline mixture and a 30% gasoline mixture are needed for 2,100 L of an 35% gasoline mixture?
A. So, 1,050 L of 45% gasoline mixture is needed and 1,050 L of 30% gasoline mixture is needed. B. So, 1,138 L of 45% gasoline mixture is needed and 962 L of 30% gasoline mixture is needed. C. So, 962 L of 45% gasoline mixture is needed and 1,138 L of 30% gasoline mixture is needed. D. So, 700 L of 45% gasoline mixture is needed and 1,400 L of 30% gasoline mixture is needed. E. So, 1,400 L of 45% gasoline mixture is needed and 700 L of 30% gasoline mixture is needed.
Determine whether the system is a nonlinear system or a linear system.
A. linear system B. nonlinear system