In order for students to have a club at school they need a minimum of 21 students. If there are 16 students signed up for the club, how many more students does the club need? What are the solutions? Select the correct choice below and fill in the answer box to complete your choice. I need help pleas!​

Solve the system. -a+4b+2c=-8 3a+b-4c=9 b=-1 a.(0,11) ,-1,2) c.(1,1,-2) d.(2,-1,-1)

I’m which figure is point g an orthocenter

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¯¯¯¯¯¯¯¯)?