Solve the system of equations by the substitution method.
A. (7, 0)
B. (0, 7)
C. infinite number of solutions
D. no solution
Answer: D
Mathematics
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Determine whether the statement is an expression or an equation.5x2 + 9x - 21
A. Expression B. Equation
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Solve the equation.5x = 15
A. 10 B. 2 C. 3 D. 9
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Solve the problem.If an object is propelled upward from a height of 96 feet at an initial velocity of 80 feet per second, then its height h after t seconds is given by the equation 
After how many seconds does the object hit the ground?
A. 6 sec B. 11 sec C. 3 sec D. 5 sec
Mathematics
Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative real zeros for the function.f(x) = 7x8 + 3x6 + 2x4 + 5x2 + 2
A. 
B. 
C. 
D. 
Mathematics