I NEED HEL A what is 12x+62x= ?

(fee points have a great day or night) :D

You invested $5000 between two accounts paying 4% and 9% annual interest, respectively. if the total interest earned for theyear was $350, how much was invested at each rate? $was invested at 4% andwas invested at 9%.

The square root of 9x plus 7 plus the square rot of 2x equall to 7

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?