Describe the solution set as an inequality and in interval notation. |5x + 4| > 5
A. x < - 
or x > 
; 
? 
B. - 
< x < 
; 
C. - 
< x < 
; 
D. x < - 
or x > 
; 
? 
Answer: D
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Establish the identity.
= 
What will be an ideal response?
Find the value of the expression without using a calculator.log2(log416)
A. 4
B. 
C. 2
D. 1
The cost of controlling emissions at a firm goes up rapidly as the amount of emissions reduced goes up. Here is a possible model.
?
?
where x is the reduction in sulfur emissions, y is the reduction in lead emissions (in pounds of pollutant per day), and C is the daily cost to the firm (in dollars) of this reduction. Government clean-air subsidies amount to $600 per pound of sulfur and $50 per pound of lead removed. How many pounds of pollutant should the firm remove each day to minimize the net cost (cost minus subsidy)?
?
A. 3.5 lb of sulfur and 2 lb of lead
B. 6 lb of sulfur and 1 lb of lead
C. 3 lb of sulfur and 1 lb of lead
D. 1.9 lb of sulfur and 3.5 lb of lead
E. 1 lb of sulfur and 3 lb of lead
Solve the problem.Express the total shaded area as the product of two binomials.
(The figures are not drawn to scale.)
A. (2x + 5)2 B. (5x + 2)(5x - 2) C. (5x + 2)2 D. (5x + 2)(25x2 - 20x + 4)