Molly ordered x number of cakes for the reception. each cake served 12 people. select all of the following expressions that represent the total number of servings of cake that molly will have for the reception.

Solve: 3x+y=6 4x-2y=18 show all work !

Ihave trouble finding the nth term of a linear sequence

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)