Look at δabc. which triangle is congruent to δabc by the asa criterion?

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!