Solve the system.  figure 1.png)
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(a) x = -0.25, y = 3.5
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Solve the equation. Write complex solutions in standard form.9x2 + 7x + 4 = 0
A. 
± 
B. - 
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C. 
± i
D. - 
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Use the information in the table to solve the problem. Write your answer as a fraction in lowest terms.The table below shows the amounts of pollutants (in parts per million) in a sample of rainwater.
Find the ratio of pollutant E to pollutant A.
A. 
B. 
C. 
D. 
Solve the problem.Accent Woodworkers knows that their marginal cost of producing x feet of custom molding is given by C'(x) = -0.00003x2 - 0.05x + 90, for x ? 1000,where C'(x) is in cents. Approximate their total cost, in dollars, of manufacturing 1000 feet of molding, using 5 subintervals over 
and the left endpoint of each subinterval.
A. $1028.00 B. $699.88 C. $314.00 D. $628.00
Given that the polynomial function has the given zero, find the other zeros.f(x) = x4 - 21x2 - 100; -2i
A. 2i, 5i, -5i B. 2i, 10i, -10i C. 2i, 10, -10 D. 2i, 5, -5