1. the sum of two numbers is 90. their difference is 18. find the numbers. a(40, 22) b(45, 45) c(36, 54) d(27, 63) e (40, 50) f (72, 90)

Ellen makes and sells bookmarks. she graphs the number of bookmarks sold compared to the total money earned. why is the rate of change for the function graphed to the left?

Look at this system of equations. -3x + 3y = 12 y = x + 4 the solution set of this system is best explained by which of these statements? a) the graphs of the equations are the same line because the equations have the same slope and the same y-intercept. the system has infinitely many solutions. b) the graphs of the equations are parallel lines because they have the same slope but different y-intercepts. the system has no solution. c) the graphs of the equations are lines that intersect at one point because the equations have the same slope but different y-intercepts. the system has exactly one solution. d) the graphs of the equations are lines that intersect at one point because the equations have the same slope and the same y-intercept. the system has exactly one solution.

Determine whether the data described are qualitative or quantitative and give their level of measurement if the data are quantitative, state whether they are continuous or discrete. soft drink sizes: small, medium, large. oa. qualitative, nominal o b. qualitative, ordinal- o c. quantitative, ordinal, discrete o d. quantitative, ordinal