Apply the Distributive Property and simplify.
- 7(x + 2) = 42
- 7x+
= 42

-7(x+2)=42

-7x-14=42     add 14 on both sides

-7x=56          divide by -7 on both sides

x=-8

Step-by-step explanation:

im not sure what you need help for, since you already have the value of x. 0_o

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