Step-by-step explanation:
3t + 4 = 19
3t = 15
Hence t = 5.
Answer:

<u>(1/216)</u> is the right answer.
Bobby should grow an amount greater than 70-61 = 9 inches to become taller than 70 inches. Therefore, the correct answer is that Bobby must grow an amount of x> 9 inches to be taller than 70 inches.
Missing informations but this can be turned into y=4x-12