Write an algebraic expression for the specified quantity.Stevie bought a stereo for $215 and put it on sale at his store at a 65% markup rate. Let x = the price of the stereo before it was marked up. Write an algebraic expression in x for "the amount of markup on the stereo."
A. 1.65x
B. x + 0.65x
C. 0.65x
D. x - 0.65x
Answer: C
Mathematics
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Solve by completing the square to obtain exact solutions.x2 = 9 - 4x
A. -1 ± 
B. -2 ± 
C. 2 + 
D. -2 ± 2
Mathematics
Solve the equation.-7x - 9x = -64
A. {4} B. {32} C. {- 32} D. {-4}
Mathematics
Determine whether the argument is valid or invalid by using a truth table.p ? qp ? r----? ~ r ? q
A. 
The argument is valid.
B. 
The argument is invalid.
C. 
The argument is invalid.
D. 
The argument is invalid.
Mathematics
Find the real zeros, if any, of each quadratic function using the quadratic formula. List the x-intercepts, if any, of the graph of the function. G(x) = x2 + 5x - 14
A. x = 7, x = 2 B. x = -7, x = -2 C. x = -7, x = 2 D. x = 7, x = -2
Mathematics