A fruit stand sells watermelons for $3.50 each. Which equation can be used to determine the
total price, p, of purchasing a given number of
watermelons, w?

no

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,