The expression is 5x - 2y
Use PEMDAS and work out the rest
x = 3 and y = 4
5 x = 5 x 3 = 15
2 y = 2 x 4 = 8
15( x ) - 8 (y) = 7
The answer is 7
Hope This Helps You!
Good Luck Studying :)
the whole triangle is call an acute equilibrium triangle if that's the answer your looking for if not I need to see the whole question
Y=.05x +4100
Y=.05(3)+4100
Y=.15+4100
Y=4100.15