The ratio of boys to girls is 5 to 4. there are 80 boys. how many girls are there?

Find all the values of x that make 0.1x + 0.25(102 - x) < 17.10 true.

Find the quotient. 50a2 – 98b2 -5a +7b

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