How much is two thousand three hundred and five-tenths, plus one hundred twenty-five and one-hundredth, plus five thousand ten and fifteen-hundredths?

a. 7,435.21
b. 7,435.66
c. 7,485.25
d. 7,590.1

The answer is B. 

Hope that helps, if you need any more help, just ask : )

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!