Find the limit.
(15 - 2x)
A. -51
B. -21
C. 51
D. 21
Answer: C
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Solve the problem.You have $50,000 and wish to invest part at 10% and the rest at 6%. How much should be invested at each rate to produce the same return as if it all had been invested at 9%?
A. $37,500 at 6%, $12,500 at 10% B. $37,000 at 10%, $13,000 at 6% C. $37,000 at 6%, $13,000 at 10% D. $37,500 at 10%, $12,500 at 6%
Graph the equation by hand.y = - 
x + 3
A. 
B. 
C. 
D. 
Combine like terms.11t + 14t
A. 25t B. -25t C. -3t D. 25t2
Solve the problem.The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by 
where x represents the concentration of the hydrogen ions in the solution in moles per liter. Find the hydrogen ion concentration if the 
A. 0.1 B. 1010 C. 10-10 D. 2.3