when adding two rational numbers tell what the sign of the sum will be if one rational number is positive and one is negative

Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 seconds

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

The graph and table shows the relationship between y, the number of words jean has typed for her essay and x, the number of minutes she has been typing on the computer. according to the line of best fit, about how many words will jean have typed when she completes 60 minutes of typing? 2,500 2,750 3,000 3,250