Multiply.(2x + 7)(2x + 7)
A. 2x2 + 27x + 49
B. 2x2 + 28x + 27
C. 4x2 + 28x + 49
D. 4x2 + 49x + 28
Answer: C
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Find an equation of variation in which y varies inversely as x and the following is true.y = 34, when x = 22
A. y = 
B. y = 
C. y = 1.55x
D. y = 748x
Solve.x(x + 17) = 0
A. {1, -17} B. {17, 0} C. {-1, -17} D. {-17, 0}
Solve the equation.32x + 3x - 6 = 0
A. 
B. 
C. {ln 6}
D. 
Matrix A is an input-output matrix associated with an economy, and matrix D (units in millions of dollars) is a demand vector. Find the final outputs of each industry so that the demands of both industry and the open sector are met.
Round each answer to one decimal place, if necessary.
$__________ million output of the first sector
$__________ million output of the second sector
$__________ million output of the third sector