What is 1 ten thousand + 19 thousands+ 2 tens+ 9 ones in standard form

Hey am have account in but wished to create an account here you guys will me with my make new friends of uk !

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap

Which of the following contains a variable?