WILL MARK BRAINLIEST PLZ ANSWER FAST GUYS AND GIRLS I AM CRYING. Don't mind the second question. You can answer it if you want that will help me.

Answer:
1. 10d + 5n = 85
2. idk how to attach stuff
3. 17 nickels
4. 8.5 thats weird tho since its not possible to get 85 with using only dimes you would have to use 8 dimes and 1 nickel but its doesn't ask for that so 8.5 ig
Step-by-step explanation:
5n = 85
5*17 = 85
10d = 85
10*8.5 = 85