Find a formula for the nth term of the arithmetic sequence.
First term 2.5
Common difference -0.2
an = [? ]n + [ ]

an = 2.5n -0.2

Step-by-step explanation:

an = 2.5n -0.2

for the points

step-by-step explanation:

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116