Which equation is rewritten to solve for x?

Which of the following expressions is equal to 2x^2+8

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Aflower has 26 chromosomes. to create a new flower, how many chromosomes would a sperm cell have? what is this process called? part 2: within a flower cell that has 26 chromosomes, how many chromosomes would a cell that is created within the stem of a flower as it grows, have? what is this process called?