What do the moon and sun have in common

They are locked together in stable orbits due to gravity - All have gravity -  All of them are in the Milky Way -  The Moon orbits the Earth, the Earth orbits the Sun - Because they appear to be the same size in the sky, the Sun, Earth and Moon work together to create eclipses - Earth depends on both the Sun and the moon for life as humans know it to exist.

Explanation:

complete the square on the right side of the equation;

-5(x + 0)^2 + 15

answer: d. y = -x^2 + 15

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.