The equation 21 + 0.25p = c gives the cost in dollars that a store charges to deliver an appliance that weighs pounds. Use the equation and a table to find the weight of an appliance that costs dollar 56 to deliver.

Answer 1

To find the weight of an appliance that costs $56 to deliver, we can substitute the given cost into the equation 21 + 0.25p = c and solve for p.

Let's set c = $56 and solve for p:

21 + 0.25p = 56

Subtract 21 from both sides:

0.25p = 56 - 21

0.25p = 35

Divide both sides by 0.25:

p = 35 / 0.25

p = 140

Therefore, the weight of an appliance that costs $56 to deliver is 140 pounds.