Question

Suppose a refrigerator that sells for$700 costs $85 a year for electricity. Write an expression for the cost to buy and run the refrigerator for x years.

Answer 1

Explanation:

700 + 85x <=== ur expression

Answer 2

first refrigerator cost

C(x1)=700+85x
C(10)= 700+850
C(10)= 1550

refrigerator 2nd

C(x2) = 1000+25x
C10) =1000+250
C(10)=1250
Now you know it.
same cost

700+85x=1000+25x
60x=300
x= 5 years