Solve the system using Gauss-Jordan elimination.
–3x? + 9x? = 15
2x? – 6x? = –10
x? = 3s – 5, x? = s, s any real number
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Graph the polar equation.r2 = 5 sin 2?
A. 
B. 
C. 
D. 
Solve the problem.The height h in feet of a projectile thrown upward from the roof of a building after time t seconds is shown in the graph below. Find and interpret h(0.6).
A. 425 ft; The projectile will be 425 feet above the roof of the building 0.6 seconds after it is thrown. B. 375 ft; The projectile will be 375 feet above the roof of the building 0.6 seconds after it is thrown. C. 400 ft; The projectile will be 400 feet above the ground 0.6 seconds after it is thrown. D. 450 ft; The projectile will be 450 feet above the ground 0.6 seconds after it is thrown.
Solve the absolute value equation. 
= 9
A. {0} B. {0, -18} C. ? D. {0, 18}
Estimate the product:
?
?
A. 28,000 B. 21,000 C. 24,000 D. 32,000