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Find m(-10) if m(t) = -(t + 6).
Find a(-6)if a (n)=7+n
Any help is greatly appreciated.​

User Cyril Deba
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1 Answer

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So notice how the variable inside the parentheses after the function changes into a number (t changes to -10 and n changes into -6). This means to change every variable within the function into the number inside the parentheses that the variable turned into.
So, for m(-10) if m(t) = -(t + 6):
m(-10) = -((-10)+6)
Remember, flip the equation since it's a negative outside the parentheses.
m(-10) = (10 – 6); m(-10) = 4
Same for the second equation.
a(-6) if a(n) = 7 + n
a(-6) = 7 + (-6)
a(-6) = 7 – 6
a(-6) = 1

So these are your answers:

m(-10) = 4
a(-6) = 1
User Yutseho
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