Hello! i need help,, again,, :sob:

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

What are the domain and range of the function f(x)=2^x+1

The deepest part of the swimming pool is 12 feet deep.the shallowest part of the pool is 3 feet deep.what is the ratio of the deeply of the deepest part of the pool to depth of the shallowest part of a pool?