Answer:
number 1 so a (=
Step-by-step explanation:
So you're finding the hypotenuse? If so use pythagorean theorem. a^(2)+b^(2)=c^(2)
so 8^2 + 6^2 = 100 then square root of 100 is 10 which is the answer. if you're finding a leg then do c^2-a^2=b^2 (a and b can be switched out for each other)
F(x) = x^2 - 8x + 5
f(-1) = -1^2 - 8(-1) + 5
f(-1) = 1 + 8 + 5
f(-1) = 14 <==
EF and GH. those are the right answers