Question

How many solutions does this linear system have?

y = 2x – 5

–8x – 4y = –20

a. one solution: (–2.5, 0)
b. one solution: (2.5, 0)
c. no solution
d. infinite number of solutions

Answer 1

you know that you can put this into wolfram

Answer 2

here
http://www.wolframalpha.com/input/?i=solve+y+%3D+2x+%E2%80%93+5%2C+%E2%80%938x+%E2%80%93+4y+%3D+%E2%80%9320

Answer 3

solve –8x – 4y = –20 for y and you should have your answer

Answer 4

but you have to interpret the results , obviously