How u ever stayed in a beach house before 1+1+1+1+1+2334+43=

What is the common difference in the following arithmetic sequence? 7,3,-1,-5

Matt and brian were solving a system of equations. they both noticed that the two lines had the same slope. brian said that because each line in the system had the same slope, the two lines had to be parallel, which meant the solution to the system was "no solution" matt disagreed, and said they should also look at the y-intercepts before determining how many solutions there were. who is correct?

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers