Solve the equation.ln (21) - ln x = ln (x - 4)
A. x = -3
B. x = 
C. x = 7
D. x = 7, x = -3
Answer: C
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Solve the logarithmic equation.log x + log(x + 1) = log 42
A. {7}
B. 
C. {6}
D. {7, -6}
Solve the problem.A used piece of farming equipment sold for 9% of its original value, or for $500. Find the original value of the piece of farming equipment.
A. $545 B. $509 C. $45 D. $950
Suppose that an automobile manufacturer has accepted orders for 30 minivans, 25 sport utility vehicles, and 15 sedans. These orders can be represented by the row vector Q = [ 30 25 15 ].The "raw materials" that go into each type of vehicle are steel, glass, plastic, paint, and labor. The entries in matrix R below give the number of units of each raw material (in this order) which are needed for each type of vehicle. R = 
. Suppose that steel costs $800 per unit, glass costs $400 per unit, plastic costs $300 per unit, paint costs $200 per unit, and labor costs $1000 per
unit. This data can be written as the column cost vector C = 
. The price the manufacturer negotiated for each minivan is $16,000, for each SUV is $21,000, and for each sedan is $13,000. This information can be written as the column price vector P = 
.Use the matrix operations on a graphing calculator to find the cost of each type of vehicle.
What will be an ideal response?
Factor the perfect square.49x2 + 112x + 64
A. (7x - 9)2 B. (7x - 8)2 C. (7x + 8)(7x - 8) D. (7x + 8)2