A relation is a function, if and only if, the x- values do not repeat in a given set.
Evaluation of square root 169 = 13, so 10 + 13 = 23
The answer and explanation in the pic below
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Answer:
f(2) = - 1 and f(4) = 3
Step-by-step explanation:
To evaluate f(2), substitute x = 2 into f(x), that is
f(2) = 2(2) - 5 = 4 - 5 = - 1
To evaluate f(4), substitute x = 4 into f(x)
f(4) = - 3(4) + 15 = - 12 + 15 = 3
I'm pretty sure its the second one