Ajeweler has five rings, each weighing 18g, made of 20% silver and 80% gold. he decides to melt down the rings and add enough silver to reduce the gold content to 60%. how much silver should he add?

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¯¯¯¯¯¯¯¯)?

If i have a 24 in loaf of bread and i cut it into two pieces one 9 in how long was the other

For what values of x is x2 + 2x = 24 true?