Question

The equation P=28+2.54w models the relation between the amount of Randy’s monthly water bill payment, P, in dollars, and the number of units of water, w, used. Find the payment for a month when Randy used 15 units of water.

Answer 1

Answer: $66.1

Explanation:

Hi, to answer this question we simply have to substitute w= 15 in the formula and solve.

P=28+2.54w

Replacing w for 15 (units of water)

P = 28 + 2.54 (15)

Solving for P:

P = 28+ 38.1

P=$66.1

When he used 15 units of water, the monthly payment for Randy was $66.1

Feel free to ask for more if needed or if you did not understand something.

Answer 2

P= 66.1

Explanation:

• Randy's monthly water bill payment consists on a fixed tariff ($28) plus an extra of $2.54 for every unit of water consumed.
• Then,if an specific month Randy consumed 15 units of water, that month he would have to pay 15 x $2.54 dollars ($2.54 for every unit of water consumed) plus the fixed tariff of $28.
• Then
  `15*{2.54}+28= 66.1`, which is the payment he would have to pay.