9th Algebra

Im in 9th grade algebra. and we are learning adding and subtracting real numbers. im stumped on a couple of problems. I get confused when i see the absolute value lines. Does that change the munber? Do i just go on with the problem as if they werent there?
And i have NO idea how to do 2/5 - 7/8?!?

asked by Amanda
  1. 2/5 - 7/8

    = 2*8/5*8 - 7*5/8*5

    = 16/40 - 35/40

    = -19/40

    posted by oneirocritic
  2. 7/20

    posted by claire
  3. 1. find the latreal area of a cylinder of revolution if its altitude is 5.5 inches and the diameter of its base is 7 inches.

    posted by chris
  4. idk im in 9H soo idc either i juss need my ? answered duhhh!!!!! y else wouldi b here

    posted by Hadassah
  5. what is 10 to the second power in standard form? Please answer by the end of today. Please and Thank You

    Corinne Moore

    posted by Corinne
  6. O and btw im in 8H buhh its high skool work so yahh Earth Sci all that good stuff
    Corinne Moore

    posted by Corinne
  7. y=-2x^2-3

    posted by Karen
  8. Quadratic functions quest

    posted by Karen
  9. y=-2x^2-3

    posted by Sytashia
  10. Put these numbers in order from least to greatest.

    posted by mckayla
  11. 1223102430

    posted by britany
  12. Make an input-output table for the function use 0,1,2,3,4,5 as the x value.


    posted by Cathy
  13. Start with a numberX and 12,then divide by 4,next subtract7, and finally multiply by 2. a. convert the description to an algebraic expression. b.ifx=5,what is the value of the expression?

    posted by Del Ali

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