Answer:
Step-by-step explanation:
the angles of a triangle add up to180.
70 plus 30 plus x = 180
100 plus x =180
x=80
<h2>Answer:</h2>
11 and 15
<h2>Explanations:</h2>
Given the arithmetic sequence -1, 3, 7 __, __, you are to find the next two terms of the sequence.
The nth term of an arithmetic sequence is given as;
![T_n=a+(n-1)d](https://tex.z-dn.net/?f=T_n%3Da%2B%28n-1%29d)
where:
• a is the ,first term
,
• n is the ,number of terms
,
• d is the ,common difference
From the given sequence;
a = -1
d = 3 - (-1) = 7 - 3 = 4
For the fourth term, n = 4;
![\begin{gathered} T_4=-1+(4-1)\cdot4 \\ T_4=-1+3(4) \\ T_4=-1+12 \\ T_4=11 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20T_4%3D-1%2B%284-1%29%5Ccdot4%20%5C%5C%20T_4%3D-1%2B3%284%29%20%5C%5C%20T_4%3D-1%2B12%20%5C%5C%20T_4%3D11%20%5Cend%7Bgathered%7D)
For the fifth term, n = 5;
![\begin{gathered} T_5=-1+(5-1)\cdot4 \\ T_5=-1+4(4) \\ T_5=-1+16 \\ T_5=15 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20T_5%3D-1%2B%285-1%29%5Ccdot4%20%5C%5C%20T_5%3D-1%2B4%284%29%20%5C%5C%20T_5%3D-1%2B16%20%5C%5C%20T_5%3D15%20%5Cend%7Bgathered%7D)
Therefore the next two terms of the arithmetic sequence are 11 and 15.
The value of variable a is -45 if you explained question correctly
Answer:
k
Step-by-step explanation:
Answer:
Step-by-step explanation:
Decomposers are the organisms that feed on dead plants and animals. Decomposers are the last link on the food chain. Examples of decomposers. 1) Bacteria. 2) Fungi (singular- Fungus) 3) Algae. 4) Lichen. Example of a rock covered with algae.