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28.09.2020 •
Mathematics
Evaluate the expression below if x=-1 and y=3.
3x²-y²
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Ответ:
-6
Step-by-step explanation:
3x² - y²
plug in x and y
3(-1)² - (3)²
according to PEMDAS, solve the exponents first.
3(1) - 9
multiply
3 - 9
subtract
= -6
Ответ:
y=1/3x + 4
Step-by-step explanation:
1/3x Because we do not know how many minutes plus because he starts at 4