In the matrix shown, which element is A1,2?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Me n o w. i need t h i s. 10 points

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.