What is 3.8 as a repeating decimal as a fraction

Dropping less than two inches per mile after emerging from the mountains, a river drains into the ocean. one day's discharge at its mouth, 5.6 trillion gallons, could supply all of country a's households for seven months. based on this statement, determine how much water an average household uses each month. assume that there are 100 million households in country a. country a uses approximately nothing gallons per household per month.

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.