Why are sharks so successful at what they do?

Explanation:

Their ability to change direction at high speed means they can catch smaller prey, such as bony fish. Sharks' skeletons are made of cartilage, which is highly flexible and allows their considerable agility. Their ability to change direction at high speed means they can catch smaller prey, such as bony fish.

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles