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Alika [10]
3 years ago
11

Six years after a tree was planted, its height was 7 feet. Nine years after it was planted, its height was 16 feet. Which of the

following equations gives the height y, in feet, of the tree after x years if the tree grows at a constant rate? Check all of the boxes that apply.
A) y – 6 = 3(x – 10)

B) y – 16 = 3(x – 9)

C) y = 3x – 11

D) y = –3x – 23
Mathematics
2 answers:
horrorfan [7]3 years ago
7 0
It is 
y-16=3(x-9)
y=3x-11 
b & c
slava [35]3 years ago
3 0
<h2>Answer:</h2>

B & C

<h2>The rest of the assignment here</h2>

Part 6 : C

Part 7 : y = 4x + 19

Part 8 : 1/2 , -10 (They try to trick you here with a + sign, make sure to add the negative symbol)

<h2 /><h2 /><h2>Part 9 : </h2>

<em>The answer is 12x + y = 185 </em>

<em> </em>

<em>The common formula for a two variable linear equation is: ax + by = r </em>

<em> </em>

<em>The lab starts with 185 dishes which is y-intercept: </em>

<em>ax + by = 185 </em>

<em> </em>

<em>The number of dishes used per day is 12 which is slope: </em>

<em>12x +by = 185 </em>

<em> </em>

<em>Therefore, the two variable linear equation for this example is 12x + y = 185.</em>

<h2>Part 10 : </h2>

<em>To solve for the variable cost:</em>

<em>11 - 5 = 6</em>

<em>3.24 - 2.70 = 0.54</em>

<em>0.54 / 6 = 0.09 per print</em>

<em></em>

<em>To solve for the fixed cost</em>

<em>0.09 x 5 = 0.45</em>

<em>2.70 - 0.45 = 2.25 </em>

<em></em>

<em>y = 2.25 + 0.09x</em>

<em></em>

<em>y = 2.25 + 0.09(5) = 2.25 + 0.45 = 2.70</em>

<em>y = 2.25 + 0.09(11) = 2.25 + 0.99 = 3.24</em>

<em>y = 2.25 + 0.09(20) = 2.25 + 1.8 = 4.05</em>

<em></em>

Hope I helped you out!

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