Nuala drives to her grandma's. she drives at 20 miles per hour. the journey takes 50 minutes. how long would the journey take if Nuala drove at 40 miles per hour?

answer:

c. the third graph

a. is correct

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,

i dont know

step-by-step explanation: