Multpiply first equation by 3 and second by 5 to clear nasty faractions
-13x-6y=21
15x+2y=25
now see which ones we can clear
we can clear y
multiply second equation by 3 and add to the first equation
-13x-6y=21
<u>45x+6y=75 +</u>
32x+0y=96
32x=96
divide both sides by 32
x=3
sub back
15x+2y=25
15(3)+2y=25
45+2y=25
minus 45 from both sides
2y=-20
divide both sides by 2
y=-10
x=3
y=-10
(3,-10)
Answer:
Not a function but a relation
Step-by-step explanation:
It is not a function because 10 is matched with both 4 and 20.
Answer
Linear equation: 55+8(x)=y
Volume in the sink after 25 min= 255 gallons
Step-by-step explanation:
The amount at the beggining is 55 gallons and is not changing
the water filling the tank is changing increasing 8 gallons per minute
the independent variable is the minutes and we can represented with the x
the dependent variable is the amount at the end of the minutes and we can represented with the y
The linear equation is 55+8x=y
With this equation we can find the volume after 25 minutes
=55+8*25
=255
