Which choice is equivalent to the expression below? √40 + 2√10 + √90

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?

What is the distance from zero if a quadratic function has a line of symmetry at x=-3 and a zero at 4

Suppose that 15 inches of wire cost 60 cents. at the same rate, how much (in cents) will 12 inches of wire cost