The correct answer is 4737768399700 Hope this helps!
600 is 10 times larger than 60
X-5y=-21
x=-21+5y
-6(-21+5y)+4y=10
126+-30y+4y=10
126+-26y=10
-26y=-116
y=4.4615
x=1.3076
9c + 15d = 87
I don't know how to use the equation to answer it, but 4 DVDs were bought, and 3 CDs were bought.
X=-1/3 and x=4 are the positive and negative x intercepts