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never [62]
3 years ago
10

The table shows the heights in inches of trees after they have been planted. Determine the equation which relates x and y.

Mathematics
1 answer:
fenix001 [56]3 years ago
8 0
To get the that relates x and y, we choose two points on the table and use the equation of a straight line as follows:

Recall that the equation of a staight line is obtained from the formula
\frac{y-y_1}{x-x_1} = \frac{y_2-y_1}{x_2-x_1}

Using the points (30, 18) and (36, 24), we have
\frac{y-18}{x-30} = \frac{24-18}{36-30}= \frac{6}{6} =1 \\  \\ \Rightarrow y-18=x-30 \\  \\ \Rightarrow y=x-30+18 \\  \\ \Rightarrow y=x-12
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Sunny_sXe [5.5K]

Answer:

(x + 5) (x + 4)

Step-by-step explanation:

Simplify the following:

x^2 + 9 x + 20

The factors of 20 that sum to 9 are 5 and 4. So, x^2 + 9 x + 20 = (x + 5) (x + 4):

Answer: |

| (x + 5) (x + 4)

4 0
3 years ago
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iogann1982 [59]

Answer:

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Step-by-step explanation:

4 times 20 - X

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Unknown variable = what you are trying to find.

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