Can someone answer this question please please help me I really need it if it’s correct I will mark you brainliest .

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¯¯¯¯¯¯¯¯)?

Place the following steps in order to complete the square and solve the quadratic equation,

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?