Use dimensional analysis to change 4 miles per hour to feet per second. explain!

Which graph represents 2x-5y< 15

Nine more than four times a number is the same as one less than twice the number. find the number?

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?