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an online electronics store bought 20 keyboards and 15 phone chargers for $130 and then sold each keyboard for $30 and each phone charger for $15. part a: which expression represents the amount of money the store made? (1 point) (20)(30) (15)(15) − 130 (20)(15) (15)(30) − 130 (20)(30) (15)(15) 130 (20)(15) (15)(30) 130 part b: explain why your answer to part a is correct. (1 point) part c: what is the value of the expression you chose in part a? show each step of your work. (2 points)

Sagot :

The  Expression is (20)(30)+(15)(15)-130

Number of keyboards bought by store = 20

Number of phone charger bought by store = 15

Price of each keyboard = 30

price of each phone charger = 15

Part A

Amount of money the store made = (number of keyboards)(Price of each keyboard)+(Number of phone charger)(price of each phone charger)-(the cost of purchase)

Substituting the values we get

Amount of money = (20)(30)+(15)(15)-130

Part B:

The answer in Part A is correct because the total price of the commodity can be calculated by multiplying the price of the item with number of items bought.

Part C :

The value of the expression in part A is $600+$225-$130=$695

Therefore , The value of the expression is $695.

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