Se pretende tapizar una pared rectangular de 4 m por 5 m, si el centímetro cuadrado de papel tapiz cuesta 0.28 dólares. Calcule el valor a pagar

5600 dollars

Step-by-step explanation:

The first thing we must do is calculate the area of the rectangle since the value is given per unit area.

They give it per square centimeter, therefore we must pass the measurements from meters to centimeters, knowing that 1 meter is 100 centimeters:

4m * 100cm / 1m = 400cm

5m * 100cm / 1m = 500cm

Now the area would be:

A = 400 * 500 = 20000

20000 cm ^ 2 would be the area of the rectangular wall, we calculate the value like this:

20000 * 0.28 = 5600

In other words, it has a value of 5600 dollars.

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3