Can you find the sum [5.5 + (-2.3)] + (-5.5 + 2.3) without preforming any additions?

A16 ounce bottle of orange juice says it contains 200 milligrams of vitamin c which is 250% uh just read the paper it explains it better

To complete your spring schedule, you must add calculus and physics. at 9: 30, there are three calculus sections and two physics sections; while at 11: 30, there are two calculus sections and three physics sections. how many ways can you complete your schedule if your only open periods are 9: 30 and 11: 30?

Can someone me find the original price? the discount is 5% and the sale price is $68.40