Answer:
X=4
Step-by-step explanation:
distribute the 4 to the ones in the parenthesis
-4x+28=12
move the 28 over and change the sign
-4x=-16
divide by -4
x=4
Answer: Choice A) 3x3
The 3x3 refers to the number of rows and the number of columns in that order.
As another example, this matrix

is a 4x3 matrix because it has 4 rows and 3 columns.
Answer:
A) 2.50
Step-by-step explanation:
subtract 8.75 and 6.25 to get the cost of 1 pizza slice since Alfredo bought 1 more pizza than Jessica.
6 yrs ago was when she was 8 times older