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Marina86 [1]
3 years ago
9

What is equivalent to 3x-4-(5x+7)

Mathematics
2 answers:
larisa86 [58]3 years ago
7 0
Easy, so here’s what you do, take care of the parenthesis so it looks like 3x-4 because the negative is disturbed to make the positive 5x a negative and the positive 7x into a negative, a good pointer is anytime you’re multiplying two signs, a good thing to know is if the signs are different, it’s negative, if they’re the same, they’re positive. Now you want to move the negative 5x to the left of the +3x so you should see -5x+3x-4-7 so from here, you want to add the -5x to the 3x to get you -2x so now you should have -2x-4-7 then subtract the 4 from the seven or the seven from the four looking like 4-7 to get you -11 so now you should have
-2x -11 << I hope this helped!! ^_^
SIZIF [17.4K]3 years ago
6 0
-2x-11 is equivalent to 3x-4-(5x+7)
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The probability that Gina randomly selected two red marbles is 1/19

<u>Explanation:</u>

Total number of marbles = 7 + 5 + 8

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The probability of getting two red marbles in the fraction form is given as:

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P(second red marble) = number of red marbles after 1 white marble is removed / total number of marbles after 1 red marble is removed.

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