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
Answer:
The cost of each kilogram of strawberries is $7.50.
Step-by-step explanation:
24.75=C
24.75=$6+2.5x
-6 -6
18.75=2.5x
18.75/2.5=2.5x/2.5
$7.5=x
Answer:
It is probably 21x-3y= -2
Answer:
3x=42
Step-by-step explanation:
42 is how many there were last year tripled
x is how many there were last year