Question

The screen of Brian's cellphone is the shape of a rectangle with a length of 5 x 2 feet

and a width of 6x"". Brian wants to cover the screen with a plastic shield to prevent it
from scratching. Brian tried to calculate the area but made a mistake. Identify and
explain the error. What is the correct solution? Note: A= L XW
Incorrect Work/Solution
(5x)(6x)
(5:6)(x2-8)
30x16
The area of the screen is 30x16 ft?

Answer 1

The error in Brian's calculation is that he multiplied the length (5x) and the width (6x) incorrectly. The correct solution is: Area = Length * Width = (5x) * (6x) = 30x^2 feet.

Step-by-step explanation:

The error in Brian's calculation is that he multiplied the length (5x) and the width (6x) incorrectly. Instead of multiplying the two variables, he should have multiplied the constants (5 and 6) with the variables (x and x) separately. The correct solution is:

Length = 5x

Width = 6x

Area = Length * Width = (5x) * (6x) = 30x^2

So the correct area of Brian's cellphone screen is 30x^2 feet.