The three altitudes of δabc intersect at point f. point f is the
a) centroid.
b) circumcenter.
c) incenter.
d) orthocenter.

The answer would be D-orthocenter

Step-by-step explanation:

The definition for orthocenter is the point where 3 altitudes of a triangle intersect. (inside my math vocab)

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11

answer: i wpould go with c

step-by-step explanation: