Solve the problem.A square plywood platform has a perimeter which is 7 times the length of a side, decreased by 18. Find the length of a side. 
A. 1
B. 9
C. 6
D. 3
Answer: C
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Write the equation of a sine function that has the given characteristics.Amplitude: 4Period: 3?
A. y = 4 sin 
B. y = 3 sin 
C. y = 4 sin (3x)
D. y = sin (3x) + 4
Solve the problem.The table below shows the results of a consumer survey of annual incomes in 100 households. 
What is the probability that a household has an annual income between $15,000 and $44,999 inclusive?
A. 0.48 B. 0.3 C. 0.78 D. 0.5
Solve the system by the substitution method.xy = 27x2 + y2 = 90
A. {(3, 9), (-3, -9), (9, 3), (-9, -3)} B. {(3, 9), (-3, -9), (3, -9), (-3, 9)} C. {(-3, -9), (-9, -3), (-3, 9), (-9, 3)} D. {(3, 9), (9, 3), (3, -9), (9, -3)}
Use the typical college grade values, A = 4, B = 3, C = 2, D = 1, and F = 0, to calculate the GPA. Round to the nearest hundredth, if necessary.
A. 2.50 B. 1.50 C. 3.46 D. 9.00