What is straight, is part of a line, and has 2 end points?

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 graph represents the parent function of y=(x+2)(x-2)

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.