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romanna [79]
3 years ago
6

PLEASE HELP WITH THIS ONE QUESTION

Mathematics
1 answer:
poizon [28]3 years ago
6 0

Answer:

2nd, 3rd and 4th answers are true

Step-by-step explanation:

1)false \\  \\ 2)16 {x}^{2}  - 64 {y}^{2}  \\  {4}^{2}  {x}^{2} -  {8}^{2}   {y}^{2}  \\ (4x - 8y)(4x + 8y) =  > true \\  \\ 3) {x}^{2}  - 169 \\  {x}^{2}  -  {13}^{2}  \\ (x + 13)(x - 13) =  > true \\  \\ 4) {9x}^{2}  - 1 \\  {3}^{2}  {x}^{2}  -  {1}^{2}  \\ (3x - 1)(3x + 1) =  > true \\  \\ 5)false

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Answer: The length of the candle was 13.5 inches before it was lit.

Step-by-step explanation:

Let the length of candle in the beginning be c.

Constant rate of change in length of candle=  -1.6 inches per hour

Since rate of change is constant so the length of candle can be represented by a linear function [Linear function has constant rate of change.]

Linear function : f(x)= mx+c , where x= independent variable.

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Let x = Number of hours after the candle was lit.

Put m=  -1.6 , x= 3 and f(x)= 8.7 , we get

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Step-by-step explanation:

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