How many solutions does the system of equations have?

3x + 12y = 20
y = -1/4x + 5/3

a. one
b. two
c. infinitely many
d. none

Will mark the brainliest.paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each?