Explain Why there may be more restrictions when you divide rational expressions then when you multiply the same two expressions. Use an example to illustrate your exclamation.

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¯¯¯¯¯¯¯¯)?

Which of the following is correct interpretation of the expression -4+13

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?