In triangle def, the length of de is sqrt30 inches, and the length of ef is 3 inches. if it can be determined, what is the length, in inches, of df?

don't just give me the answer- i know it. i need to know how this problem is solved with a real explanation so i can get them right in the future.

Which inequality has a dashed boundary line when graphed ?

Amanda went into the grocery business starting with five stores. after one year, she opened two more stores. after two years, she opened two more stores than the previous year. if amanda expands her grocery business following the same pattern, which of the following graphs represents the number of stores she will own over time?

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x