Solve the linear equation.
= 
+ 
A. 
B. {0}
C. 
D. 
Answer: C
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Solve the problem.An experimental model for a suspension bridge is built in the shape of a parabolic arch. In one section, cable runs from the top of one tower down to the roadway, just touching it there, and up again to the top of a second tower. The towers stand 40 inches apart. At a point between the towers and 10 inches along the road from the base of one tower, the cable is 1 inches above the roadway. Find the height of the towers.
A. 4.5 in. B. 6 in. C. 3.5 in. D. 4 in.
Solve.5x2 - 3x = -4
A. - 
± 
i
B. 
± 
i
C. 
± 
D. - 
± 
Solve the problem.The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands). Use the equation of the least squares line to predict the number of products sold if the cost of advertising is $9000. 
A. 25,165.8 products sold B. 87.61 products sold C. 77.91 products sold D. 80.91 products sold
Plot the point on the given axes.(0, -5)
A. 
B. 
C. 
D. 