Point R is located at (-9,8) and point T is located at (-9,-7) on a coordinate plane. What is the distance, in units, between points R and T? Enter the answer in the box.
units
HELP

The answer would be (c)

Anyone can me with these answers

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.