Tim’s client wants to sell her house and needs an estimate of its value. To get an initial estimate, Tim averages the sale price of similar homes in the area. He also adjusts the value of each of these homes using a multiplier to take any differences in value into account. His formula is:

v a l u e equals fraction numerator left parenthesis 1.2 right parenthesis left parenthesis 270 comma 000 right parenthesis plus left parenthesis 0.9 right parenthesis left parenthesis 250 comma 000 right parenthesis plus left parenthesis 1.1 right parenthesis left parenthesis 215 comma 000 right parenthesis plus left parenthesis 1 right parenthesis left parenthesis 235 comma 000 right parenthesis plus left parenthesis 1.3 right parenthesis left parenthesis 240 comma 000 right parenthesis over denominator 5 end fraction

To solve this formula and find the estimated value of the house, we can follow these steps:

Step 1: Substitute the given values into the formula.
Value = (1.2 * $270,000) + (0.9 * $250,000) + (1.1 * $215,000) + (1 * $235,000) + (1.3 * $240,000) / 5

Step 2: Simplify each multiplication operation.
Value = $324,000 + $225,000 + $236,500 + $235,000 + $312,000 / 5

Step 3: Add all the values together.
Value = $1,332,500 / 5

Step 4: Divide the sum by 5.
Value = $266,500

Therefore, based on Tim's formula, the estimated value of the house is $266,500.

Please put in the parentheses "()", slash marks "/" to indicate a fraction, and commas "," to clarify your question.

When doing a calculation involving zoning laws, Tim comes across the following expression:

a-|a| over a

where a is either a positive or a negative number.

(A) What is the value of the expression when a=5?

(B) What is the value of the expression when a=-5?