18 is 30 percent what is the total

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 4x^2 - 19x- 5

Extra points! find the missing dimension! need asap

Acommunity group is building a garden on a rectangular lot of land. the lot measures 5x by 10x and the garden will be circular with a radius of 3x. how much of the land will be left over after the garden is built? a. 41 pi x^2 b. x^2 (50 - 9 pi) c. x^2 (50 - 3 pi) d. 41x^2