What is the answer to 2+1/6a=-4

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

The graph of f(x) = |x| is transformed to g(x) = |x + 11| - 7. on which interval is the function decreasing?

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?