Sunday

December 21, 2014

December 21, 2014

Posted by **brooke** on Thursday, September 24, 2009 at 8:35pm.

1.|2x-15|

2.|-2y=8|-9

3.|w-x|-|10y-w|

- Math, not "11th grade" -
**Writeacher**, Thursday, September 24, 2009 at 8:39pmAssistance needed.

Please type your__subject__in the**School Subject**box. Any other words are likely to delay responses from a teacher who knows that subject well.

- 11th grade -
**Christiaan**, Thursday, September 24, 2009 at 8:47pmThe | | signs mean "absolute value". When you take the absolute value of a number, you always take the numbers positive value. So |-5| = 5, |-21| = 21, |24| = 24, |5| = 5, and so on.

So, for the first expression, if we replace the x with 5, we get that:

|2*x-15| = |(2*5)-15| = |10-15| = |-5| = 5

There seems to be an error in your second expression, because there can't be any equals signs inside the || signs.

For the third expression we get that:

|w-x|-|10y-w| =

|-3-5| - |(10*3.5)-(-3)| =

|-8| - | 35 + 3| =

8 - 38 = -30

**Answer this Question**

**Related Questions**

11th grade - The students of litchfield High school are in grades 9,10,11,12. Of...

math help - 5x+10y +15z-15x+10y-5z+5x-10y-5z / (5x+10y+15z)-(15x+10y-5z)+(5x-10y...

math 11th grade - evaluate each function. g(x)=|x-2|+3;find g(0)

Algebra 2 - "My husband's age," remarked a lady the other day, "is represented ...

PLEASE HELP - Simplify the following algebraic expressions: Evaluate; P(-1/2) if...

Math:Evaluate Expressions - e/3-2x3 for e=41.4 Please explain. Thank you!

algebra - How do I solve this with the elimination method? 5x-10y=4 5x-10y=5 I ...

maths - decide whether the graphs of the two equations are parallel lines: 1. 2x...

Science - In an ionic compound, what is the net ionic charge? and what compound ...

11th grade English - What is the timeline of chapters 13 through 18 of The ...