Answer:
f(1)= 12-31+7
Step-by-step explanation:
f(1) = -12
its D
100
let the unknown number be y
y= 8850/88.5
y=100
given,
(x y)= (k -3)
so ,
5x- 2y= -24
or, 5k +6 =-24
or,5k =-24 - 6
or,5k= -30
therefore,
k=-6