A trail mix is made up of peanuts that cost p dollars per pound and dried fruit that costs d dollars per pound. A blend of 1/2 p
ound of peanuts and 3/4 pound of dried fruit costs $6.50. A blend of 3/4 pound of peanuts and 1/4 pound of dried fruit costs $4.50. Which matrix equation can be used to solve for the cost of 1 pound of peanuts and the cost of 1 pound of dried fruit?