Use the function rule f(x)=x^2
Find f(2.5)__
2 answers:
Answer:
6.25
Step-by-step explanation:
f(x)=x^2
f(2.5) = (2.5)^2
=6.25
Answer: 6.25
Step-by-step explanation: Notice that <em>f</em> is a function of <em>x</em>.
So we want to find f(2.5).
We find f(2.5) by plugging 2.5 in for <em>x</em>
everywhere that <em>x</em> appears in the function.
So we have f(2.5) = (2.5)².
(2.5)² is 6.25.
So our answer is 6.25.
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Answer:
24
Step-by-step explanation:
use Pythagoras theorem
a^2 + b^2 = c^2
18^2+b^2=30^2
b^2 = 30^2 - 18^2
b = √576 =24
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