Help me with this please the ones that I circled in the picture also don't forget to explain so I can understand it please. I will try to help you with other questions if you help me by explaining not only answering.

Answer: "<" ,"<', ">"
FOR THE FIRST QUESTION IT WOULD BE "<" BECAUSE THE SQAURE ROOT OF 7 IS 2.646 AND IF U ADD THREE TO THAT IT IS 5.646 WHICH IS LESS THAN 6.
FOR THE SECOND QUESTIONS THE SQUARE ROOT OF 10 IS 3.162 SO IF YOU DO 4 - 3.162 IT WOULD BE 0.838 WHICH IS LESS THAN 1.414 WHICH IS THE SQAURE ROOT OF 2 SO THE ANSWER WOULD BE "<".
FOR THE LAST QUESTIONS THE SQAURE ROOT OF 20 IS 4.472 IF YOU ADD THAT TO 8 IT WOULD BE 12.472 WHICH IS LESS THAN 13 SO THE ANSWER WOULD BE ">".