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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It would be 90m3 because all the angles are the same
3(n-9)=-3
3n-27=-3
3n=-30
n=-10
Answer:
The average rate of change from x= -2 to x=0 is 0 (second option)
Step-by-step explanation:
Point A=(-2, 1)=(a, f(a))→a=-2, f(a)=1
Point B=(0, 1)=(b, f(b))→b=0, f(b)=1
Average rate of change from x=a to x=b:
r=(f(b)-f(a)) / (b-a)
Replacing the given values:
r=(1-1) / (0-(-2))
r=(0) / (0+2)
r=(0) / (2)
r=0
