Question

Given the following system of equations, for which value of a will you have no
solution? (Please give your answer to two decimal figures)
7x + 21y = 13
4x + ay = - 5​

Answer 1

Answer:

For no solution lines should be parallel

so a1/a2=b1/b2$\neq$c1/c2

so 7/4=21/a$\neq$13/-5

so a=12

Step-by-step explanation: