Let's set up two equations:
x+y=20 We know she brought total of 20, some of each so x=small y=big
20x+ 30y=450
x+y= 20
-y -y
------------
x= 20 -y
substitute into the other equation:
20 (20-y) + 30y = 450
400 - 20y + 30y = 450
400+ 10 y = 450
10 y = 50
y= 5
So she brought 5 big cases. Then substitute the value of y into one of the equations.
5+ x = 20
x= 15
So we bought 15 small cases and 5 big cases.
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Answer:
your correct
Step-by-step explanation:
good luck
She will save $45 dollars a week the working is
150÷10
=15
30%=15×3
$45
René Descartes was the person who created analytic geometry and the Cartesian coordinate system
What will happen once we enter that class code?
