In order to make this equation true you would have to add to it if you want w to equal 12. As it stands the equation would work out as follows...
7w = 87
w = 87/7
w = 12 3/7
As you can see 12 3/7 does not equal 12. The answer is 12 with 3 left over, so to make the equation true with w remaining 12, we have to take those 3 extras away by changing the problem...
7w + 3 = 87
7w = 87 - 3
7w = 84
w = 84/7 = 12
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Answer:
100 black marbles
Step-by-step explanation:
The experimental probability of a black marble is
P(black) = 4/20 = 1/5
We expect that out of the 500 marbles in the box, 1/5 of them are black
1/5 (500) = 100
There should be 100 black marbles
Answer:
300 Miles
Step-by-step explanation: