Answer:
X+6
Step-by-step explanation:
f(x) + g(x)
f(x) + g(x) = (x * 2 + 1) + (5 - x)
2 Simplify or expand
(x * 2 + 1) + (5 - x)
Mutiply
>
(2x + 1) + (5 - x)
Determine the sign
2x + 1 + 5 - x
Combine like terms
x + 6
A
Right angle triangle. To find the length of AB use Pythagorean theorem.
AB² = 8² + 22²
= 64 + 484
= 548
AB = √548
= 23.41 cm