jessajanegroble

Suppose a,b,c,s,t are all integers, a 6=0,a∣b and a∣c . Then a∣(sb+tc) . Use it in a proof of the following: Prove that if a is a non- 0 integer, k∈Z,a∣(4k+3) , and a∣(2k+1) , then a=1 or a=−1 . Suggestion: use proof above and the fact that only divisors of 1 are 1 and -1 . 

Give some real life examples (at least two) of a business that has used a specialist marketing agency to carry out primary research for them.
  

You are an employee at a social media consulting firm with a number of clients who you consult with regularly. Previously, your working hours were 9:00 AM to 5:00, but because of your clientele’s unusual working hours, your company now requires you to be on-call for three hours after work