Simplify the algebraic expression.4.2(-2.4x - 1.4)
A. -10.08x - 1.4
B. -10.08x - 5.88
C. 10.08x - 1.4
D. 10.08x - 5.88
Answer: B
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Find the indicated limit or state that it does not exist.
A. 4 B. 0 C. 8 D. 1
You sell calculators at a base price of $63 each. To encourage volume purchases, you deduct $2 from the base price for each extra calculator purchased. So, if one calculator is purchased you charge $63. If two are purchased you charge $61 for each calculator. If three are purchased, you charge $59 for each calculator, and so on. ? A. What is the total amount you charge a customer who buys 5 calculators? ? B. What is the total amount you charge a customer who buys 6 calculators? ? C. Write a formula that gives the total amount C, in dollars, you charge a customer who buys n calculators.
What will be an ideal response?
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. 3.98 × 10-10 B. 2.51 × 10-10 C. 3.98 × 10-9 D. 2.51 × 10-9
Multiply and simplify.
? 
A. 
B. v2
C. - 
D. - 