Find a set of parametric equations for the given Cartesian equation.y = 4x - 1
A. y = 4t, 4x = t + 1; 0 ? t < ?
B. x = t, y = 4t2 - 1; 0 ? t < ?
C. x = 
, y = t - 
; 0 ? t < ?
D. x = t, y = 4t - 1; 0 ? t < ?
Answer: D
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Simplify the expression by combining like terms, if possible.2y5 + 5y5
A. -3y5 B. 7y10 C. Cannot be simplified D. 7y5
Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, give the solution with y arbitrary.5x - 2y - 10 = 010x + y - 25 = 0
A. 
B. 
C. 
D. ?
Solve the application. Write an expression to describe the situation and simplify the expression for the final answer.On a mountain climbing expedition, the temperature at the summit of the mountain was -4°F. By the time the climber reached the base of the mountain, the temperature had risen 22°. What was the temperature at the base of the mountain?
A. -4 + 22 = -18; The temperature at the base was -18°F. B. -4 + 22 = 18; The temperature at the base was 18°F. C. -4 + (-22) = -26; The temperature at the base was -26°F. D. -4 + (-22) = 26; The temperature at the base was 26°F.
Find the equation of the least squares line.The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands). 
A. y = 55.8 - 2.79x B. y = 55.8 + 2.79x C. y = -26.4 - 1.42x D. y = 26.4 + 1.42x