\( \begin{array}{ll}y=-80 x+4,500 & \text { Write the equation. } \\ y=-80(\square+4,500 & \text { Replace } x \text { with } 55 \\ y=\square & \text { Simplify. }\end{array} \)

Sure! Let’s substitute \( x = 55 \) into the equation and simplify it. First, replace \( x \) in the equation \( y = -80x + 4,500 \) with 55: \[ y = -80(55) + 4,500 \] Now, calculate \( -80(55) \): \[ -80(55) = -4,400 \] So, plug that back into the equation: \[ y = -4,400 + 4,500 \] Now, simplify: \[ y = 100 \] Thus, the value of \( y \) when \( x = 55 \) is \( 100 \).