A silver picture frame has a mass of 198 grams and a volume of 18 cubic centimeters. What is its density? also what is its grams per cubic centimeter
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Answer this question! 30 points and brainliest! only if you know the answer.

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

What is the value of x in the equation 2(x-4) = 4(2x + 1)?