How do you write an algebraic equation of the sum of the average and 4 is -6

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)

X+y=-4 x-y=2 use elimination with adding and subtraction