Morgan is trying to complete the square. What number should she put in the blank? A) -9
B) 18
C) 81
D) -81

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¯¯¯¯¯¯¯¯)?

Ihave trouble finding the nth term of a linear sequence

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !