Are angles 1 and 4 linear pair, vertical angles or neither? you! : )

Answer this question, only if you know the answer. 30 points and brainliest!

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.