a coin collection contains nickels and quarters. there are 30 coins in the collection. the number of quarters is 2 more than the number of nickels. how many nickels are in the collection?

What is the sum of these mixed numbers 2 1/8 + 4 3/8

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¯¯¯¯¯¯¯¯)?

Solve the equation below: (x+4)/6x=1/x a. x=2 b. x=0,2 c. x=-2 d. x=0,-2