Can someone explain to me on how to find the gcf in like bigger numbers. for example the picture shows one of the problems i'm stuck on how to find out the

When y’all answer can y’all explain too !

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

Libby built a fence that was 56 \text { feet}56 feet long over 44 days. she built the same length of fence each day. how many inches of fence did libby build each day?