Arectangle is 8 feet long. its width is represented by "seven plus x feet.",which expression represents the area, in square feet, of the rectangle.

A= 8 * (7+ x)

Step-by-step explanation:

since the area of a rectangle is l*b

l= 8 feet

b= 7+ x feet

thus a= 8*(7+x)

The square footage could be expressed as 8x + 56

Step-by-step explanation:

To find this, we take the length and multiply by the width.

A = L*W

A = 8(x + 7)

A = 8x + 56

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct

mr. india