This for accounting. Please help

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

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.