A shopkeeper's net earning for a day is given by the expression 12n - 3n - 80, where n is the number of items sold, ₹12 is the selling price, ₹3 is the cost per item and ₹80 is fixed rent. First simplify the expression, then find its value when n = 25 (answer in ₹).

Question

Accepted Answer

145. 12n - 3n - 80 = 9n - 80. For n = 25: 9 x 25 - 80 = 225 - 80 = 145, so the net earning is ₹145.

A shopkeeper's net earning for a day is given by the expression $12 n - 3 n - 80$ , where $n$ is the number of items sold, ₹12 is the selling price, ₹3 is the cost per item and ₹80 is fixed rent.
First simplify the expression, then find its value when $n = 25$ (answer in ₹).

Step-by-Step Solution

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More Class 7 Finding the Value of an Expression practice

A shopkeeper's net earning for a day is given by the expression 12n−3n−80, where n is the number of items sold, ₹12 is the selling price, ₹3 is the cost per item and ₹80 is fixed rent.First simplify the expression, then find its value when n=25 (answer in ₹).

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 7 Finding the Value of an Expression practice

A shopkeeper's net earning for a day is given by the expression $12 n - 3 n - 80$ , where $n$ is the number of items sold, ₹12 is the selling price, ₹3 is the cost per item and ₹80 is fixed rent.
First simplify the expression, then find its value when $n = 25$ (answer in ₹).