Please help
x-2.6y=-3.2

-x+4.5Y=7

one solution : (2,2)

Step-by-step explanation:

hello :

the system is : x-2.6y=-3.2 (*)

                         -x+4.5y=7(**)

add(*) and(**) : -2.6y+4.5y = -3.2+7

                         1.9y=3.8

y = 3.8/1.9 =2

put this value in (*) : x - (2.6)(2) =-3.2

x =(2.6)(2) -3.2 =2

one solution : (2,2)

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!