How many quarts are there in 10 1⁄2 gallons? Write an equation to show your work
plz answer fast it is a test!

Determine the fraction of total interest owed. after the fourth month of a 12-month loan: the numerator is: {(n + ) + (n + ) + (n + ) + (n + )} = , and the denominator is: {(n) + (n + 1) + + (n + )} = . therefore, the fraction is numerator/denominator (to the nearest tenth) =

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

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.