i can you please help me step by step if you do illl give you brainlyst

Answer:
? would equal 25
Step-by-step explanation:
You plug the input into the rule. When x=4, y=21 because 4(4) +5 =21. The 4 in the parentheses is the input. So you would do the same when the input is 5. 4(5) +5= 25
Hope this helps! Please let me know if you need anymore clarification :)