Answer the question.If we apply the quadratic formula and find that the value of b2 - 4ac equals zero, what can we conclude about the solutions?
A. The equation has no real number solutions.
B. The equation has two different rational solutions.
C. The equation has exactly one rational solution.
D. The equation has exactly one irrational solution.
Answer: C
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An air freight company has three types of aircraft which carry three types of cargo. The payload, in tons, is summarized in the table below. 
On Saturdays, the company must move 23 tons of mail, 16 tons of medical supplies, and 17 tons of freight. This system of equations can be represented by the matrix: 
. Reduce this matrix to calculate how many aircraft of each type should be used.
What will be an ideal response?
Convert.7.4 mm = ___ m
A. 0.074 B. 740 C. 0.0074 D. 7400
Determine the constant that should be added to the binomial so that it becomes a perfect square trinomial. Then write and factor the trinomial.x2 - 
x
A. 
; x2 - 
x + 
= 
2
B. 
; x2 - 
x + 
= 
2
C. 
; x2 - 
x + 
= 
2
D. 
; x2 - 
x + 
= 
2
Solve the problem.If the cost, C(x), for manufacturing x units of a certain product is given by 
, find the number of units manufactured at a cost of $8600.
A. 90 units B. 40 units C. 50 units D. 100 units