The sum of two numbers is 0. Twice the smaller numbers subtracted from 3 times the larger number is 10. Let X represent the larger number and y represent the smaller number. Which equations represent this situaation?

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate. true or false?

Can someone me with my math problems i have a bunch. i will give brainliest and lots of pleeeaaasssee