Luis rides his bicycle 3/4 mile in 15 minutes along the bike trail. Assuming he rides at a constant rate, what is his speed, in miles per hour? Hint it is not 3Mph I tried that already need help asap

Liang bought a basket of apples to make pies for her friends. the basket of apples weighed p pounds. before she had time to make the pies, she ate 3 pounds of apples. there are 17 pounds of apples left to make pies.