Evaluate the expression for the given replacement values. Write the answer in simplest form.x - y for x = - 
, y = - 
A. 
B. - 
C. 
D. - 
Answer: A
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Use Stokes' Theorem to calculate the circulation of the field F around the curve C in the indicated direction.F = 3yi + yj + zk; C: the counterclockwise path around the boundary of the ellipse 
+ 
= 1
A. 36? B. 12? C. -36 D. -36?
Provide an appropriate response.Find the discriminant of the equation: 10 + 4x - x2 = 0
A. The discriminant value is -24. B. The discriminant value is 56. C. The discriminant value is 24i. D. The discriminant value is 48.
The demand equation for the Roland portable hair dryer is given by 
, where x (measured in units of a hundred) is the quantity demanded per week and p is the unit price in dollars.
?
Is the demand elastic or inelastic when 
?
?
__________
?
Is the demand elastic or inelastic when 
?
?
__________
?
When is the demand unitary? Round the answer to two decimal places. (Hint: Solve 
for p).
?
p = __________
?
If the unit price is increased slightly from $10, will the revenue increase or decrease?
?
__________
?
If the unit price is lowered slightly from $8, will the revenue increase or decrease?
?
__________
What will be an ideal response?
Find the slope of the line that passes through the two given points.(2, 9) and (8, 7)
A. - 3
B. 
C. - 
D. 