An=a1+d(n-1)
an=nth term
a1=first term
d=common difference
7 is first term=a1
the common difference is -2, they increase by -2 each time
an=7-2(n-1)
expand and distribute
an=7-2n+2
an=9-2n
C is answer
4 squared is the answer to this equations
<span>$20/16=$1.25/candy bar
Candy bars cost $1.25 each </span>
Answer:
I'm pretty sure the first one is b
I’ll try to work out this problem and let you know when I am finished and give you the answer