17 is the sum of 4 and one-third of a number. what is the equation and what is the number?

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¯¯¯¯¯¯¯¯)?

Find the area of the regular hexagon if a side is 20 cm.

What is the anwers for 9+2x=5x-3-x