Asquare can be changed into a rectangle by increasing the length of the square by 5 units and increasing the width by 3 units. which expression represents the area of the rectangle in square units?

To represent the area of this rectangle, you will write expressions that represents the new length and the new width. x Will represent the original side length.

l = x + 5
w = x - 3

A= lw
(x + 5)(x - 3)
This becomes x^2 + 2x - 15.

45 of the phones are black smartphones.

Step-by-step explanation:

We sould this question treating these probabilities as Venn events.

I am going to say that:

Event A: Smartphone.

Event B: Black.

450 are smartphones and 270 are black.

This means that .

225 phones are not black and not a smartphone

This means 900 - 225 = 675 are either black or a smartphone, that is,

How many of the phones are black smartphones?

This is:

Considering the values we found:

45 of the phones are black smartphones.