Please help. Will mark as Brainliest.

81

Step-by-step explanation:

A=wl - area of a rectangle

5x6=30

9x4=36

3x5=15

15+36+30=81

hope this helps!

81 m^2

Step-by-step explanation:

First find the area of the lower rectangle

A = l*w

A = 12* 5 = 60m^2

Then we find the area of the middle rectangle

The height is 4m - 3m = 1 meter

The length is 12m - 3m = 9m

A = 9*1 = 9m^2

Then we find the area of the top rectangle

The length is 4 m and the width is 3 m

A = 3*4 = 12m^2

The total area is 60+9+12 =81 m^2

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

1. x> -5

2. x< 8

step-by-step explanation:

1. 2x> -10

divide by 2 from both sides of equation.

2x/2> -10/2

simplify, to find the answer.

-10/2=-5

x> -5 is the correct answer.

2. 3x< 24

divide by 3 from both sides of equation.

3x/3< 24/3

simplify, to find the answer.

24/3=8

x< 8 is the correct answer.

i hope this you, and have a wonderful day!