Solve for x in the diagram below.

x = 20

Step-by-step explanation:

x + 2x + (x + 10) = 90° (right angle)

x + 2x + x + 10 = 90

Add like terms

4x + 10 = 90

4x = 90 - 10 (substraction property of equality)

4x = 80

x = 80/4 (division property of equality)

x = 20

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