What are the similarities and differences between linear equations and arithmetic sequences?

If eh = hg and hg=16, find the diameter of k

Find the value of x for which abcd must be a parallelogram -9-6x x-30

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?