Simplify this radical. 84

An angle that measures between 90 and 180° is called a(,

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

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.