Find the circumference of each circle. use 22/7 for pi
please answer asap

Figure abcd is a parallelogram. if point c lies on the line x = 2, what is the y-value of point c

Solve the system of equations. y= 2x y= x^2 - 15

Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )