Y=3x-10 and 3x+2y=16
y=3x-10
subsitute 3x-10 for y in other equation
3x+2y=16
3x+2(3x-10)=16
distribute
3x+6x-20=16
9x-20=16
add 20 both sides
9x=36
divide both sides by 9
x=4
sub back
y=3x-10
y=3(4)-10
y=12-10
y=2
x=4
y=2
(4,2) is soluiton
So because 25%=1/4 we would know to multiply 9*4
Which would get our answer to be 36 :)
100, because, x^2 - 20x + 100 = ( x - 10 )^2;
<span>64-24 = 40
</span><span>D) 40 gallons</span>
