Consider the following proportion: 2 7 = 12 x use cross products to write the equation: 2x = 84. what is the value of x?

Value of x is:

42

Step-by-step explanation:

We are given a proportion as:

2:7= 12:x

or we can write it in the ratio form as:

using cross multiplication, we get

2x=84

On dividing both sides by 2, we get

x=42

Hence, Value of x is:

42

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b