It is best to use the calculator on the last step and enter both log functions in
the same set of keystrokes. If you calculate the log of 18.52 alone, you will get
1.267640982. You could make careless errors and waste precious time as you
try to retype this number into the calculator.
Another approach to this problem would be to try each answer choice, using
the power key on your keypad.
In the following problem, a graphing calculator would give you a decided
advantage.
This type of problem can be solved by the substitution method for
simultaneous equations. An efficient alternative method is first to solve each
equation for y, then graph the two functions on a graphing calculator. You can
then use the Intersect function to solve the system, arriving at the points (1,6)
and (–2,0). Choice (D) names one of these.
6. What is a possible solution to the system?