Elisa's mom teaches at a preschool. there is 1 teacher for every 12 students at the preschool. elisa is setting up equivalent ratios to find the number of teachers at the preschool. determine her mistake and correct it.

if you mean

then it's c. 8, -7/3

but if you mean

then it is

you're missing vital information, add to it so we can solve this problem for you.

step-by-step explanation:

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,