Answer the **3** following questions right and I will mark Brainliest

Answer:
1: 45 + 25x = C(x)
2: 145
3: [4, 8]
Step-by-step explanation:
Answer:
1)
C(x) = 45 + 25x
2)
C(4) = 45 + 25*4
C(4) = 45 + 100
C(4) = 145
3)
y = 5 + 0.25*6
y = 5 + 1.50
y = 6.50
maybe it’s (6,7)
I am not 100% positive about the third problem. I hope it’s correct.