your tip of 20% would be $7.60
answer: 25 and -31
step-by-step explanation: notice that if all the negatives were positive, you'd have the arithmetic sequence one, 7, 13, 19, on and on, adding vi each time. therefore essentially we have a geometrical and arithmetic sequence combined, with the geometric sequence creating it positive, and negative, and also the arithmetic sequence adding vi each time. this suggests the answer(s) are twenty-five and -31.
amount of money that caitlin in her account = $ 402
in each week , she withdrew $ 15.
let number of weeks she had paid money for swimming lesson = $ 237
writing the above statement in equation form
⇒ 402 - 15 n = 237
⇒ 402 - 237 = 15 n
⇒ 15 n = 165
dividing both side by 15, we get
→number of weeks that caitlin had learnt swimming = 11 weeks