Answer:
Aside from rocks and fossils, radioactive dating can also be used to date man-made objects, such as archaeological materials and ancient artifacts. The scientists can estimate the age of the stone tools by looking at the age of the sediment layers where they are found. In this case, knowing the age of tools would involve dating the traces of charcoal in the ashes from the hearths.
Step-by-step explanation:
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3 boxes of tangerines....each box has 93 tangerines.....so thats a total of
(93 * 3) = 279 tangerines.
to be divided equally between 9 class rooms...279/9 = 31
each classroom will get 31 tangerines
4(x + 7) = 38
Since there is no operation sign between the 4 and parenthesis, it makes it an automatic multiplication problem.
You would use distributive property to multiply each which should leave your equation looking like this afterwards:
4x + 28 = 38
(4 times x and 4 times 7)
You would then solve it like a two step equation,
1. +28 - 28 = 0
2. 38 - 28 = 10
4x = 10
10 divided by 4 = 2.5
x = 2.5
We can recheck our work by substituting in the value of x.
4(2.5 + 7) = 38
10 + 28 = 38
When we substituted in the value, it gave us the correct inequality.
Therefore,
x = 2.5
Answer:
Answer is BD
Step-by-step explanation: