9th Algebra

posted by Amanda

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?!?

1. oneirocritic

2/5 - 7/8

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

= 16/40 - 35/40

= -19/40

2. claire

7/20

3. chris

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.

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

5. Corinne

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

Corinne Moore

6. Corinne

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

7. Karen

y=-2x^2-3

8. Karen

9. Sytashia

y=-2x^2-3

10. mckayla

Put these numbers in order from least to greatest.
-
1
2
-
3
10
2
24
30
Submit

11. britany

1223102430

12. Cathy

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

Y=5(15-x)

13. Del Ali

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?

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