Step-by-step explanation:
<em>2</em><em>+</em><em>1</em><em>9</em><em>=</em><em>7x</em>
<em>2</em><em>1</em><em>=</em><em>7x</em>
<em>21</em><em>÷</em><em>7</em><em>=</em><em>7x</em><em>÷</em><em>7</em>
<em>3</em><em>=</em><em>x</em>
<em>.</em><em>.</em>
Answer:
6. Line graph
Step-by-step explanation:
It shows how information changes over time
Answer:
median =19
mean=26.8
Step-by-step explanation:
<u>-MEDIAN</u> is the middle number when arranged in ascending order
-MEAN is the sum (total) of all values set devided by the number of values on the list
Answer:
Its a+10
Step-by-step explanation:
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1. <span>Tribal culture hunts buffalo on grasslands
2. </span><span>Mechanized culture uses plows to turn grasslands into farms
3. </span><span>Climate changes so farms die
4. </span>Group migrates away from area