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jeka57 [31]
3 years ago
13

Can someone please help me

Mathematics
1 answer:
Nonamiya [84]3 years ago
4 0

Answer: (b) 7.8 degrees

Step-by-step explanation: You need to pay attention to the number -8.4. It says the temperature changed by +2.7 degrees an hour for 6 HOURS. Therefore, your equation would be -8.4 + (2.7 * 6).

You have to solve whats in the parenthesis first, so your equation would end up being -8.4 + 16.2 making your answer 7.8 degrees.

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8x + y = -16<br> -3x + y= -5
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<span>Solve for x,y by substitution 
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-------
Substitute for "y" and solve for "x"::
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