Absolute Value Expressions

[harpazo]

Section R.2
Algebra Essentials
Michael Sullivan
Textbook: College Algebra Edition 9

Find the value of each expression if x = 3 and y = -2.

50. |x| + |y|

Solution:

|3| + |-2|

3 + 2

Answer: 5

Yep, looks right to me.

53. 3|x| + 2|y|

Solution:

3|3| + 2|-2|

9 + 2(2)

9 + 4

Answer: 13

I say correct. You?

55. ||4x| - |5y||

Solution:

||4(3)| - |5(-2)||

||12| - |-10||

|12 - 10|

|2|

Answer: 2

Doing good so far, right?

 

[JeffM]

Yes.

 

[harpazo]

Ok. Cool.