A marble is drawn at random from a bag which contains nine yellow marbles and six white marbles . Find the probability of white marble?

Someone . me. compound probability

What is the standard form of -5x^2+2x^4-11+x^3+3x

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?