In a certain chemical, the ratio of zinc to copper is 4 to 19. a jar of the chemical contains 684 grams of copper. how many grams of zinc does it contain?

Missy took the act and was told her standard score (z-score) is –1. frank took the sat and was told his standard score (z-score) is –2. which student has a better chance of getting admitted to college based on their test score?

Find the area of the triangle shown 3 by 6

Which table shows a proportional relationship between miles traveled and gas used?