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galben [10]
3 years ago
12

Evaluate the function. f(x) = 3x2 + 16 Find f(-1)

Mathematics
1 answer:
SIZIF [17.4K]3 years ago
4 0

Answer:

f(-1)=19

Step-by-step explanation:

<u>Evaluating Functions</u>

Given a function y=f(x), evaluate the function for x=a means substituting the variable for the given value.

We have the function:

f(x)=3x^2+16

Find f(-1):

f(-1)=3(-1)^2+16

f(-1)=3(1)+16

f(-1)=3+16

\boxed{f(-1)=19}

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4. What are the values of x and y? HELP PLEASE
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The bottom answer is correct. I had some trouble with this so I had to find x and y in separate parts.

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For some reason, this does not give a correct value for Y, so I had to use trig 

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Notice that the angle DAB is the same as DBC (lets call this angle Ø)

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