How do you evaluate sqrts+absrs+|r| given r=-3, s=4, t=-7?

2 Answers
Jun 3, 2018

See a solution process below:

Explanation:

The variable tt is not use in the expression in the problem therefore we can ignore it in this problem.

To evaluate sqrt(s) +abs(r)s+|r| we need to substitute:
- color(red)(-3)3 for each occurrence of color(red)(r)r
- color(blue)(4)4 for each occurrence of color(blue)(s)s

sqrt(color(blue)(s)) + abs(color(red)(r))s+|r| becomes:

sqrt(color(blue)(4)) + abs(color(red)(-3)) => 2 + 3 => 54+|3|2+35

Jun 3, 2018

55

Explanation:

"substitute the given values into the expression"substitute the given values into the expression

sqrtcolor(red)(4)+|color(blue)(-3)|=2+3=54+|3|=2+3=5

"note that the absolute value always returns a positive"note that the absolute value always returns a positive
"value"value