Igot all of these questions wrong can someone me see what i did wrong and how to fix them? (sorry if you can't read it too well)

for the first question you would want to to multiply 52*1.5 because 52 is the original price and 1.5 is the mark up. by multiplying these together you get 78. next you need to add the tax. For tax you should multiply 78*.1 (this answer is 7.8) and add the answer to 78, getting the total of 85.8. I really hope this helps :-)

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

it alot will look like this 4.4