Find the real solutions of the equation by factoring.9x3 + x2 - 9x - 1 = 0
A. {1 , -1}
B. 
C. 
D. 
Answer: D
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Find 
and 
.f(x, y) = xye-y
A. 
= ye-y; 
= xe-y(y - 1)
B. 
= ye-y; 
= xe-y
C. 
= ye-y; 
= xe-y(1 - y)
D. 
= ye-y; 
= - xye-y
Graph the quadratic equations.y = 5x2
A. 
B. 
C. 
D. 
The medical records of infants delivered at Kaiser Memorial Hospital show that the infants' lengths at birth (in inches) are normally distributed with a mean of 20 and a standard deviation of 2.6. Round your answers to four decimal places, if necessary. ? Find the probability that the length of an infant selected at random from among those delivered at the hospital is more than 22 in. ? __________ ? Find the probability that the length of an infant selected at random from among those delivered at the hospital is less than 18 in. ? __________ ? Find the probability that the length of an infant selected at random from among those delivered at the hospital is between 19 and 21 in. ? __________
What will be an ideal response?
Find the indicated trigonometric function for ?, given that ? is an angle in standard position with the terminal side defined by the given point.(15, -20); find csc ?
A. 
B. - 
C. 
D. - 