What is 50/20*23+43-32424343+3534535

Can someone me with the property questions for 12 13 and 14 plz

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.