A 12 foot ladder leans against the side of a house, as shown in the figure above. The point of intersection between the ladder and the house is 9 feet 6 inches above the ground, and the base of the ladder is 2 feet 6 inches from the
base of the house.
To the nearest inch, what length of the ladder, x, extends above the point where the ladder meets the house?

А
1 foot 11 inches
B
2 feet 1 inch
С
2 feet 2 inches
D
2 feet 3 inches

correct answer:

b.(19,-2)

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column