Solve the system mentally, without the use of a calculator or pencil-and-paper calculation. Try to visualize the graphs of both lines.x + 0y = 90x + y = 4
A. x = 9; y = 4
B. x = 4; y = 9
C. x = 9; y = 2
D. x = 2; y = 
Answer: A
Mathematics
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Write the following in exponential form. Assume that all variables represent positive values.
A. 3-7/3 B. 37/3 C. 3-3/7 D. 33/7
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Graph the equation.y = 4
A. 
B. 
C. 
D. 
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Solve.The distance it takes to stop a car varies directly as the square of the speed of the car. If it takes 112 feet for a car traveling at 40 miles per hour to stop, what distance is required for a speed of 
per hour?
A. 189.62 ft B. 201.58 ft C. 189.28 ft D. 162.24 ft
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Find the requested probability.A child rolls a 6-sided die 6 times. What is the probability of the child rolling exactly four fives?
A. .5360 B. .9688 C. .3125 D. .0080
Mathematics