78% of 20 is 15.6 so you'd need to round to 16 for your estimate. and 15% of 58 is 8.7 so to leave a 15% tip they would need to leave $8.70
You would put three x`s with a negative sign and then you will add 7 positives and 28 positives
Convert percent to decimal so it would be 0.04 then multiply that by 1280 to get 51.2 and subtract that from 1280 to get the answer which is 1228.8
Answer:
8
Step-by-step explanation:
Actually since there is only 4 cups of grape juice and 7 cups of lemonade you could only make 4 cups of punch. So your answer would be 8 because 4x2=8