The answer is 17.71. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.
0.20 + 7 + 0.09 + 0.001 = 7.291
7
7% = .07, so 19.99 + .07 = 20.06
-7 plus 10 is the same as 10 minus 7, which is 3.
20 + 7 + 09 + 001 = 37
10 + 7 + 3 = 20
23+7+10=40
7
7 + 90 / 9 + 10 + 42 - 7 7 + 10 + 10 + 16 - 7 36
7 over 10 plus 7 over 10 is 14 over 10 or 1.4
fraction which is equivalent to 0.7 = 7/10
7+10+(-6x)=17-6x