Step-by-step explanation:

Follow PEMDAS

What are you even talking about... What is the ???
Answer:
profit%=35%
Let cp be x
profit =$280
To find cost price of a refrigerator use formula
profit%=profit/cost price *100
35%=$280/x*100
35%=$28000/x
35*x=$28000
x=$28000/35
x=$800
now to find the selling price of a refrigerator use formula
selling price=cost price +profit
=$800+$280
=$1080
Step-by-step explanation:
therefore the cost price of a refrigerator is $800 and selling price is $1080
Answer:
6
Step-by-step explanation:
First you distribute the 3
(3x-12) (x+5)=0
then you set each equation equal to zero
3x-12=0 & x+5=0
then you solve for x
x =4, -5