AB and EF
BC and FD
AC and ED
A(w)=50w-w2 if the perimeter is 100, I plugged in possible values for the width...I used w=15 and length = 35 for a perimeter of 100. then I plugged these values in the possible equations until I found the correct one giving me an area of 525 (15x35) . I could not think of an easier way.
In this question , n represent the large packages . And total number of packages =12.
So , total number of small packages=12-n
Cost of large packages=$7 and of small packages=$4.50 .
So total cost is the sum of cost of large packages and cost of small packages .
That is

And in the second part, n=8 .
Substituting 8 for n, we will get

Answer:
z < 2
Step-by-step explanation:
1 + 2z < 5
<u>-1 -1</u>
2z < 4
z < 4 ÷ 2
z < 2