Solve the equation using the quadratic formula. Check your solution.
A. 
B. 
C. 
D. 
E. 
Answer: D
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Find the mean of the random variable x associated with the probability density function over the indicated interval.
?
; 
?
A. ?
B. ?
C. ?
D. ?
E. 
Solve the problem.An investment is worth $3654 in 1993. By 1997 it has grown to $5394. Let y be the value of the investment in the year x, where x = 0 represents 1993. Write a linear equation that models the value of the investment (y) in the year x.
A. y = 
x + 3654
B. y = -435x + 7134
C. y = 435x + 3654
D. y = -435x + 3654
Solve the problem.An arch in the form of a semiellipse is 52 ft wide at the base and has a height of 20 ft. How wide is the arch at a height of 12 ft above the base?
A. 41.6 ft B. 35.5 ft C. 20.8 ft D. 17.7 ft
Find the sum.-8 + (-10)
A. -2 B. -18 C. 18 D. 2