Final answer:
To solve 2x(9x5)x4, perform the operations inside the parentheses first and then multiply the result by 4. The answer is 360.
Step-by-step explanation:
To solve the expression 2x(9x5)x4, we need to follow the order of operations, which is parentheses, multiplication, and then addition/subtraction.
First, we solve the expression inside the parentheses: 2x(9x5)=90.
Next, we multiply 90 by 4: 90x4=360.