Can you solve this. Luis has 7 children nuggets and it has 280 calories. He also had dinner and the calories were 440. How much calories did he have in total?

Ineed me i stuck and i don’t want to get it wrong

At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.

Find the rate at which the water is now flowing from the tap give your answer cubic centimetres per second