1.87 is 8.5% of 22 so 8.5% of 80 is 0.085 x 80 so $6.80
I would go with A but I am not 100% sure so you may want to check however you can.
Answer:
495
Step-by-step explanation:
In order to find the sum of the first 18 terms you have to find the 18th term and the first term using the equation given.
a1=3(1)-1 a1=2
a18=3(18)-1 a18= 53
Then plug in 53 for an, 18 for n, and 2 in for a1 in the sum equation: Sn=n/2(a1+an)
Sn=18/2(2+53) Solve for sn= 495
Shapes? We need to know how they look like in order to solve
( 2a2 - 2b - 1 ) Is the answer when simplifying the expression.
