Prove that the value of expression 9^7+3^12 is divisible by 90. also, prove that 25^9+5^17 is divisible by 30. answer asap plz will be awarded brainliest answer

Show algebraically that f and g are inverse functions f(x)=x^2/-6; g(x)=square root of 2x+12

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?