Fractions at the finish line

student time ( minutes ) .

barbara : 3 3/10
donna : 2 4/5
cindy : ?
nicole : 2 1/10

the four girls ran in a relay race as a team

1 . what is the combined time of barbara, donna, and nicole?

2 . if the teams total time was 11 3/5, what was cindys time? use your answer from number 1 to you.

3 . the girls broke the school record, which was 12 2/5 minutes. how much faster were they?

The equation y=mx+b is the slope-intercept form of the equation of a line. what is the equation solved for b? y-m=b y-mx=b y/mx=b y/m-x=b

To find the extreme values of a function f(x.y) on a curve x-x(t), y y(t), treat f as a function of the single variable t and use the chain rule to find where df/dt is zero. in any other single-variable case, the extreme values of f are then found among the values at the critical points (points where df/dt is zero or fails to exist), and endpoints of the parameter domain. find the absolute maximum and minimum values of the following function on the given curves. use the parametric equations x=2cos t, y 2 sin t functions: curves: i) the semicircle x4,y20 i) the quarter circle x2+y-4, x20, y20 b, g(x,y)=xy

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?