# 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?!?

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

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.
-
1
2
-
3
10
2
24
30
Submit

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.

Y=5(15-x)

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

First Name

## Similar Questions

1. ### 9th grade algebra/Ms Sue

Okay Ms. Sue. I am in 8th grade but I am taking Algebra with 9th graders. I am very confused with my previous problem. I have asked my Dad but we are both getting confused. Now I have come up with 22. Is this my correct answer?
2. ### Algebra 1

Please, I am very confused in the Systems of Equations and Inequalities Unit Test that is only 27 questions. The test starts with: 1.Which graph represents the solution to the given system? y = –x + 2 and y = 3x – 1 I am in
3. ### 9th Grade Algebra 1

I need someone to tell me how to do these kinds of problems (In great detail please) -5x=9-2x -8x-10=4x+14
4. ### 9th grade algebra

decide whether the graphs of the two equations are parallel lines. a. y=3x+2, y=1/3x+4 b. 3y=15x+4, y=5x+1
5. ### 9th grade algebra

decide whether the graphs of the two equations are parallel lines. a. y=3x+2, y=1/3x+4 b. 3y=15x+4, y=5x+1
6. ### 9th Grade Algebra

If a is not equal to 0, and a =2b=3c, what is the value of a+b in terms of c? Would I make up numbers for the variables?
7. ### math

How is adding and subtracting mixed numbers similar to adding and subtracting fractions? How is adding and subtracting mixed numbers different than adding and subtracting fractions? Give examples to explain your answer.
8. ### 9th grade Algebra

Did I get the right answer for this? Evaluate the expression 3x squared - 5x when x= -2 My Answer is 46. I got this by doing 3 times -2 and squaring that and then multiplying 5 times -2 and subtracting that ( negative 10 ) from
9. ### Algebra

I think I am a little bit confused with this absolute value thing. When do I change the sign inside? Example f(-2)= |-2-2|. Is this equal to -4 or do I need to change a sign inside the absolute value when adding. I am trying to
10. ### Algebra (need help ASAP!!!!)

I didn't get how to do the problem. In my book it says to choose a variable and write an absolute value inequality that represents each set of numbers. Here are the problems I had-- all real numbers less than 2 units from 0 all

More Similar Questions