Two things: first, who invented the calculator? second, just wanted to let everyone know that i'm online. can with a wide variety of things, but when it comes to math, i can only with algebra 1 and simple geometry and below (pre algebra, 7th grade math, 6th grade math, 5th grade math, etc.) i'm also great most other subjects

For a read-a-thon, jay and odhràn each started reading a book at the same time and continued reading for several hours. jay's book had 278 pages, and he read 55 pages per hour. odhràn's book had 238 pages, and he read 45 pages per hour. after how many hours did they have the same number of pages left, and how many pages were left?

For each proportion find the unknown number x 1/5/8=×/15

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%