- If e = <1,4> and f= <3,-10>, what is e+f? <9, 1> <4, -6> <-9, 7> <-2, 6>?

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8/5-5/x divided by 5/6+4/x^2? How many kilometers can you run in 22 minutes? How would I sketch f(x,y) = x^2 + 9y^2 on the xy plane? I know it is a circle.? Find the area of the region between the curves x=1−y2 and x=y2−1. I'm a little confused because of the x= not y= and still can't figure it!? Solve for x: log base{5}(x+6)- log base{5}(x-5)=1?