Tina pet sits to earn extra money. she charges a flat service fee of $20, plus $20 per day. if one of her customers spent less than $160, which of the following inequalities could be used to solve for x, the number of days the customer paid for pet sitting?
$20x + $20 < $160
$20x < $180
$20x - $20 < $160
$20x < $160

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

Rewrite 9 log, x2 in a form that does not use exponents. 9log, x = log, x