Solve the system of linear inequalities.x - y ? 0 y ? -4x + 4
A. 
B. 
C. 
D. 
Answer: A
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Solve the problem.A restaurant offered salads with 7 types of dressings and one choice of 8 different toppings. How many different types of salads could be offered?
A. 15 B. 64 C. 49 D. 56
Solve.The following diagram shows a cone and its inscribed hemisphere, where the radius of the hemisphere is r and the height of the cone is h. 
Use the formulas to find the ratio of the surface area of the hemisphere to the surface area of the cone.
A. 
B. 
C. 
D. 
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. 1012 B. 10-12 C. 0.08 D. 2.48
Solve the problem.How many gallons of a 30% alcohol solution must be mixed with 60 gallons of a 14% solution to obtain a solution that is 20% alcohol?
A. 7 gal B. 27 gal C. 12 gal D. 36 gal