Louie has 20 more than twice as many baseball cards as gerarardo does. together they have at least 350 cards. at least how many baseball cards does gerardo have?

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?