Solve the system by the substitution method.
A. (-2, 1), (2, 1)
B. (1, -2), (4, 13)
C. (-1, -2), (1, -2)
D. (-2, 1), (-1, -2), (1, -2), (2, 1)
Answer: D
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State whether the scatter diagram shows strong positive correlation, weak positive correlation, strong negative correlation, weak negative correlation, or no correlation. 
A. No correlation B. Weak positive correlation C. Strong negative correlation D. Weak negative correlation E. Strong positive correlation
Solve the problem.The president of a certain university makes three times as much money as one of the department heads. If the total of their salaries is $200,000, find each worker's salary.
A. president's salary = $100,000; department head's salary = $50,000 B. president's salary = $15,000; department head's salary = $5000 C. president's salary = $150,000; department head's salary = $50,000 D. president's salary = $50,000; department head's salary = $150,000
Translate the sentence to an equation.The product of -3 and a number is 
.
A. 
= 
B. -3 + x = 
C. -3x = 
D. 
= 
Give the maximum number of zeros the polynomial function may have. Use Descarte's Rule of Signs to determine how many positive and how many negative zeros it may have.f(x) = x6 - x5 - x4 - 5x3 + 2x2 + 2x + 3
A. 6; 3 or 1 positive zeros; 3 or 1 negative zeros B. 6; 4, 2, or 0 positive zeros; 2 or 0 negative zeros C. 6; 2 or 0 positive zeros; 4, 2, or 0 negative zeros D. 6; 2 or 0 positive zeros; 2, or 0 negative zeros