Joseph buys some heating oil. He puts it in his oil tank.
The scales show the numbers of litres of oil in the tank immediately before and immediately after Joseph puts the oil in the tank.
The oil Joseph buys costs 0.40 euros per litre.
Work out the total cost of the oil that Joseph buys.

x coordinate is none

step-by-step explanation:

all you should have to do is insert 1 where the c is, representing that one car is sold.

f(c) = 250c + 500

f(1) = 250(1) + 500

f(1) = 250 + 500

f(1) = 750

he earns $750 for each car sold.

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it's possible to build a triangle with side lengths of 3, 3, and 9.- true ( b.)