Evaluate the function

Answer:
[tex] \boxed{f(10) \: is \: 70}[/tex]
Step-by-step explanation:
[tex]f(x) = { - x}^{2} - 3x[/tex]
Find f(10) ?
[tex]f(x) = { - x}^{2} - 3x[/tex]
Substitute x = 10
[tex]f(10) = { (- 10})^{2} - 3(10)[/tex]
[tex]f(10) = 100 - 30[/tex]
[tex]f(10) = 70[/tex]
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