Simplify: 3x - 9 + 13x - 6 solve this for me! it's probably easy for a lot of people, but i struggle big time with geometry. u!

You can sum like terms. Two terms can be summed if they are both constants (i.e. pure numbers) or if they involve the same powers of the same variable.

In this case, 3x and 13x can be summed because they both involve 'x' alone. The sum is

As for the other two terms, you simply have to sum two numbers, as usual:

So, the final answer is

answer: she must produce at least 9,000 windows in order to make a profit of $48,000

explanation:

48,000 - 12,000 = 36,000

36,000/4 = 9,000

$12. that is my answer.