Question

The front of Stephanie's digital music player has length equal to 40x - 9 and width equal to 30x + 8. Find the equation for the area of the front of the player and the actual area if x = 5 mm.

Answer 1

The area of the front of Stephanie's digital music player can be found by multiplying the length and width, which are given by (40x - 9) and (30x + 8) respectively. To find the actual area when x = 5 mm, substitute x = 5 into the equation.

Step-by-step explanation:

The area of a rectangle can be found by multiplying its length and width. In this case, the length of Stephanie's digital music player is given by 40x - 9 and the width is given by 30x + 8. To find the equation for the area, we multiply the length and width: (40x - 9) * (30x + 8). To find the actual area when x = 5 mm, we substitute x = 5 into the equation: (40*5 - 9) * (30*5 + 8).