Use the discriminant to find what type of solutions (two rational, two irrational, one rational, or two nonreal complex) each of the following equations has. Do not solve the equation.x2 + 4x - 7 = 0
A. one rational solution
B. two rational solutions
C. two irrational solutions
D. two nonreal complex solutions
Answer: C
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Solve the problem.Tom Quig traveled 250 mi east of St. Louis. For most of the trip he averaged 70 mph, but for one period of time he was slowed to 10 mph due to a major accident. If the total time of travel was 7 hr, how many miles did he drive at the reduced speed?
A. 60 mi B. 50 mi C. 40 mi D. 35 mi
At one high school, the mean time for running the 100-yard dash is 
with a standard deviation of 0.9 seconds. The times are normally distributed.Find the percent of times that are above 13.4 seconds.
A. 97.7% B. 84% C. 98% D. 2.5%
Solve the problems.Mike buys a bike for $2,800. In the first month after he buys it, it depreciates by 13%. What is the value of the bike after 1 month?
A. $2,787 B. $3,164 C. $2,436 D. $364
Write the satement in symbols. Let x represent the unknown number.The product of 11 and a number, added to 17.
A. 17 + 11x B. 187x C. 11 + 17x D. 187 + x