What causes waves? (in Science)

Complete the table for different values of x in the polynomial expression -7x2 + 32x + 240. then, determine the optimal price that the taco truck should sell its tacos for. assume whole dollar amounts for the tacos.

One positive number is 9 more than twice another. if their product is 95, find the numbers

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1