Write formula for arithmetic sequence when first term is not given

Six ways to add 6, 7 and 8

0.8 - 0.5 : 5 + 0.2 (i know the answer is 0.9. i need to know how to get that. as by what i'm doing i keep getting 0.5. tia)

One week, 72 people got a speeding ticket. the next week, only 36 people got a speeding ticket. what was the percent change in speeding tickets?

Keona pours 128 ounces of water into a jar 3 times to fill it. How many pints of water does it take to fill the jar? 16 pints 24 pints or 384 pints

32 over 96 in simplest form

If x = 17 cm and y = 8 cm, what is the length of z? A. 13 cm B. 19 cm C. 14 cm D. 15 cm

There are 5280 feet in 1 mile, how many feet are in 3.5 miles?

How many times does 9 go into 430?

Aretha's trip to an arty supply store took 1 1/6 hours. Her return trip took only 5/7 of time of her trip to the store. How long was Aretha's return trip? What was Aretha's total driving time?

Rewrite the expression in the form 10^n (10^1) ^3