Write as a numerical expression: the product of the quantities 7 minus 1 and 3 plus 8 ((Please help m))

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.

How can you find the magnitude of a vector, v = < x,y > , where the horizontal change is x and the vertical change is y?

The formula to determine energy is e=1/2mv2? what is the formula solved for v?