Hoà tan 0,56 g CaO vào 800 ml nước thu được dung dịch nước vôi trong có nồng độ mol là

please ask in English for easy to understand.

the monthly balance will be $75,000

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.