How to use your calculator to solve a system of 2 or 3 linear equations, as well as how to solve polynomial equations (finding zeros or roots)

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A yoga studio offers two different monthly plans.

Plan A costs $40 for each visit.

Plan B costs $120 initially, then costs $10 for each visit.

a) Write an equation for plan A, relating the price P (in $) in terms of v (the number of visits).

b) Write an equation for plan B, relating P and v.

c) How many visits until the cost of plan B equals plan A?

d) If you will visit 5 times each month, which plan should you choose?

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Answer:a) $latex P=40v$

b) $latex P=10v+120$

c) At 4 visits, plan B = plan A

d) Choose plan B, since it costs less after 4 visits. (Plan A is cheaper for 0 to 4 visits)

What? Why?

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