7. The cost of renting the party room for 10 people is $117.50. The cost of renting the room is $151.25 for 15 people. Write an
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let's recall that a year has 12 months, so 15 months is really 15/12 years.
The answer is highlighted and I put the work for checking the answer at the bottom
Step-by-step explanation:
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When Loss and Selling price ( SP ) are given , Cost price ( CP ) can be found out using the following formulae :
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We simply derived the formula from Loss = CP - SP.
First , Swap the sides of the equation :
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Move SP to right hand side and change it's sign :
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This is how , CP can be obtained when we are given loss and SP.
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