Maggie = x years old
Demarco = x + 4
Anna = 3*Demarco
Anna = 3*(x + 4)
Anna = 3x + 12
Hope this helps!
Answer:
the first one
Step-by-step explanation:
the others don't make any sense and also the first one's the only one that's in inequality form.
R= 8
C= 2,5•r+15
C= 2,5•8+15
C= 20+15
C= 35
Nina's total cost will be 35 $, £, € (i don't know which of them)
It represents the first one 3+(-1)
X= 11
If you plug in 1 for X in the equation, you will get:
f(x) =3+8
3+8=11
Hope this helps.