Find the indicated function.The length and width of a rectangle have a sum of 90. If x represents the width, what is a function to represent the area of the rectangle?
A. A(x) = (x - 90)(x - 90)
B. A(x) = (90 - x)(90 - x)
C. A(x) = x(90 - x)
D. A(x) = x(x - 90)
Answer: C
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When 
is negative, the function 
is also negative.
Answer the following statement true (T) or false (F)
Use Cramer's rule to solve the linear system. If D = 0, use another method to determine the solution set.-4x - 24 = 9y2x - 3y = 18
A. {(3, -4)} B. {(2, -3)} C. Cramer's rule does not apply since D = 0; ? D. {(3, -3)}
Sketch the function represented by the given parametric equations. Then use the graph to determine each of the following:a. intervals, if any, on which the function is increasing and intervals, if any, on which the function is decreasing.b. the number, if any, at which the function has a maximum and this maximum value, or the number, if any, at which the function has a minimum and this minimum value.x = 3t, y = t
A. Increasing on: (0, ?)
B. Decreasing on: (0, ?)
C. Increasing on: (0, ?)
D. Increasing on: [1, ?); Minimum: (1, 1)
Solve the equation.
+ 3 = 
A. - 
B. 
C. - 
D. 