Ebuka is twice as old as John, if ebuka is 24, how old is John​

What is the perimeter of square abcd? units units 28 units 37 units

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¯¯¯¯¯¯¯¯)?

Simplify the expression. -2/5(10+15m-20n)