It's actually easier than it seems. if the tax is paid in equal payments every month and the total throughout a year (12 months) is $2,820, you have to find out how much they pay every month so divide the total by the number of months 2,820/12=235 they pay $235 in taxes every month to find out the total of the taxes and the house payment, just add the monthly tax and the monthly house payment. 235+752 and your answer is the sum
If the rock climber starts at 630 feet above sea level, decending down 180 feet lower than his starting point (630) would put him at 450 feet above sea level. Hope this helps