Answer:
[tex]f(1) = 55[/tex]
Step-by-step explanation:
We are supposed to replace 'x' with 1 and then evaluate.
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[tex]f(x) = 10x + 45\\\rule{150}{0.5}\\f(1) = 10(1) + 45\\\\f(1) = 10 + 45\\\\\boxed{f(1) = 55}[/tex]
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Hope this helps!