Question 165988
The Movies charges $10 per month for membership plus $2.50 per movie rental. Movies to Go charges $4 per movie rental. For what number of movie rentals per month is The Movies the less expensive option? 
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Not quite, the equation you want:
10 + 2.5x < 4x
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2.5x - 4x < -10
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-1.5x < -10
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WE need equation to be positive, mult both sides by -1
When we do that, we have to reverse the inequality sign
1.5x > 10
x > {{{10/1.5}}}
x > 6.67
We can't have a fraction of a movie, therefore
x => 7 movies
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Try this for both 
Movies:10 + 2.5(7) = $27.50
Movies to go: 4*7 = $28.00