Hey can you me posted picture of question

I think the answer is true

Answer is TRUE.

A horizontal line test will ensure that the function is one-to-one. This means each y value is paired with exactly one x-value.

If this is true for the function, we can ensure that the inverse will have exactly one x value paired with only one y value and thus will pass the horizontal line test. 

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!