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jarptica [38.1K]
3 years ago
7

HELP 30 pts:( Evaluate 2A - 3B for A = 7 and B = -2. 20 9 8

Mathematics
1 answer:
ASHA 777 [7]3 years ago
3 0

Answer:

20

Step-by-step explanation:

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tina baked 955 cookies for a big super bowl party she had to put the cookies on 8 different tables in the party room if she spit
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Which of these is a formal definition in
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4 years ago
How do I solve this?
vodomira [7]
I’m assuming what you’re asking here is how to *factor* this expression. For that, let’s rearrange the expression into a more familiar form:

-c^2-4c+21

From here, we’ll factor out a -1 so that we have:

-(c^2+4c-21)

Let’s focus on the quadratic expression inside the parentheses. To find our factors (c + x)(c + y), we’ll need to find two terms x and y that multiply together to make -21 and add together to make 4. It turns out that the numbers -3 and 7 work out perfectly for that purpose (-3 x 7 = -21 and 7 + (-3) = 4), so substituting them in for x and y, we have:

(c + (-3))(c + 7)
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And adding back on the negative from a few steps earlier:

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3 years ago
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