HEL An energy-saving appliance uses 32% less energy than the older model it replaces. The older model uses $45.00 worth of energy per year. How much less does it cost to operate the energy-saving appliance for one year than it costs to operate the older model?

Julius went on a volunteer trip to centralamerica and took medical supplies with him. he packed a bag with 50 pounds of supplies. he brought pieces of equipment that weighed10 pounds each and bottles of medicine thatweighed pound each prepresents thenumber of pieces of equipment he broughtand b represents the number of bottles ofmedicine he brought then the total weight canbe represented by the equation 10p+b 50.the brought 3 pieces of equipment, how manybottles of medicine did he bring?