A bag of m&m's cost 0.78. how much do 9 bags cost? estimate the total.

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Acompany manufactures three types of cabinets. it makes 110 cabinets each week. in the first week, the sum of the number of type-1 cabinets and twice the number of type-2 cabinets produced was 10 more than the number of type-3 cabinets produced. the next week, the number of type-1 cabinets produced was three times more than in the first week, no type-2 cabinets were produced, and the number of type-3 cabinets produced was the same as in the previous week.