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vova2212 [387]
3 years ago
12

Please help me with this question image attached

Mathematics
1 answer:
Mumz [18]3 years ago
8 0

Answer:  (D) 9

<u>Step-by-step explanation:</u>

This is an isosceles triangle.  Since the legs are congruent, then the base angles are congruent.

9x + 3 = 84

<u>     - 3  </u>  <u>  -3 </u>

9x        = 81

<u>÷9       </u>   <u>÷9 </u>

 x         = 9

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What is the common difference of an arithmetic sequence defined by the formula an=2n−4?
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Answer:

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d = 0 - (- 2) = 2 - 0 = 4 - 2 = 2

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