Andre wants to buy a backpack. the normal price of the backpack is $40. he notices that a store that sells the backpack is having a 30% off sale. what is the sale price of the backpack?

The normal price of the backpack is $40 means that it is a 100% value of the backpack. Then after the 30% discount, the price of the backpack is $28.

Given :

To determine the sale price of the backpack, unitary method can be used. In the unitary method single unit is evaluated first and with the help of single unit, the necessary unit can be determined.

The normal price of the backpack is $40 means that it is a 100% value of the backpack. Then after the 30% discount, the price of the backpack will be:

= $28

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28$

Step-by-step explanation:

The normal price of backpack is: 40$

As mentioned in the question, store is offering 30% off sale.

To calculate 30% of the original price (that is 40$), we do

Off price = (Off price percentage)/100 * normal price

=>

=> 12

The sale price of backpack would be: Normal price - Off price

=> 40 -12

=> 28    

-7

step-by-step explanation:

x^2 + 18x + 74 = (x + 9)^2 - 81 + 74

= (x + 9)^2 - 7.

so q = -7.