Answer:
4
Step-by-step explanation:
an=-4+3(n-1)=-4+3n-3=3n-7
a1=3×1-7=3-7=-4
a5=3×5-7=15-7=8
a1+a5=-4+8=4
I think question cannot be deleted here because I also tried
Answer:
5 - 7k = -4(k + 1) - 3
5 - 7k = -4k - 4 - 3
7k + 4k = - 4 - 3 -5
11k = -12
k = -12/11
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Answer:

Step-by-step explanation:
Step one:
Given data
dimension of the rectangle
Width = 8y-1.5
Length = 1.5y+9
Required
The expression to represents the Perimeter
Step two:
the perimeter of a rectangle is expressed as

collect like terms
