Acoin contains 9 grams of nickel and 16 grams of copper, for a total weight of 25 grams. what percentage of the metal in the coin is copper?

64% of the metal in the coin is copper.

Step-by-step explanation:

A coin contains nickel = 9 grams

and copper = 16 grams.

Total weight of the coin = 16 + 9 = 25 grams

Now we have to calculate the percentage of copper in the coin.

Therefore, × 100

                = 0.64 × 100

                = 64%

Hence 64% of the metal in the coin is copper.

there are 70 more legs than eyes at the dog show (196 – 126 = 70). dogs have two more legs than eyes, and humans have the same number of legs as eyes. thus 70 is twice the number of dogs at the show, so the number of dogs is half of 70, which is 35. to get the number of humans, subtract 35 from 63: 63 – 35 = 28.

step-by-step explanation: