Answer:
Step-by-step explanation:
-9d = 63
you divide both side by -9
sooo...
d = -7
y= 1.25x+6.75
Make 31.75 y because that is the total cost he paid.
1.25x+6.75=31.75
1.25x=25
x=20
So he had 20 refills.
2 times 8 x 12
192
2 times 5 x 8
80
2 times 12 x 5
60
192+80+60=332 ft^2
A set of ordered pairs is called a relation. The set of all first components of the ordered pairs of a relation is the domain of the relation, and the set of all second components of the ordered pairs is the range of the relation. :)
