13. question in attachment

For what values of x is x2 + 2x = 24 true?

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

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