Six hundred three thousand four hundred seventy-eight
Answer:
Step-by-step explanation:

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6x + 0.8 = 1.4....subtraction property .... subtract 0.8 from both sides
6x = 1.4 - 0.8 ...simplify
6x = 0.6 ... division property ... divide both sides by 6
x = 0.6/6 ...simplify
x = 0.1
Answer:
19
Step-by-step explanation:
f(-7) = 4(-7) + 9
-28 + 9
= 19
The value of y would be 1