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QveST [7]
4 years ago
14

5.Find the domain of the following function:

Mathematics
2 answers:
Vladimir79 [104]4 years ago
3 0

Answer:

(-∞,∞)

B) x cannot equal -4, 2

Step-by-step Explanation:

The function, y = x + 2, has a domain of (-∞,∞) because the equation will remain true no matter number you plug for x.

For the second question, x would be equal to -2 and 4.  You can find this by factoring the equation.  x² + 2x - 8 = (x - 2)(x + 4)  Your answer should be B

vichka [17]4 years ago
3 0

Answer:

B) x cannot equal −4, 2

Step-by-step explanation:

x² + 2x - 8 = 0

When x = -4, 2

When the denominator becomes zero, function becomes undefined

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3 years ago
56=38+y pls help me because I will take one
wlad13 [49]

Answer:

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8 0
4 years ago
At a certain time of day, a tree 15 m tall cast a shadow of 12 m, while a second tree cast a shadow of 20 m. How tall is the sec
lilavasa [31]

25 metres tall.

Explanation:

The heights of the trees are directly proportional to the length of their shadows because at the same time of day, the sun will be at the same angle in the sky.

The trees and their shadows form 2 similar triangles:
Write as a proportion:

<span><span>heightshadow</span> <span>x20</span>=<span>1512</span></span>

<span>12x=20×15</span>

<span>x=<span><span>20×15</span>12</span></span>

<span>x=25</span> metres tall.

As check: find the constant for each tree:

<span><span>1512</span>=1.25 and <span>2520</span>=<span>1.25</span></span>

<span><span>
</span></span>

<span><span>
</span></span>

<span><span>i hope this help</span></span>

<span><span>
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8 0
4 years ago
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