4x2+36x+72
8+36x+72
80+36x
x=20/9
Answer:
it's an angle symbol, it indicates an angle in a set of intersecting lines or inside a triangle. This question probably came with an image that will help you determine the measure of degrees of the angle K (m indicates measure)
Step-by-step explanation:
3 + 6 + 9 + 12 + ... + 999
<span>= 3(1 + 2 + 3 + 4 + ... + 333) </span>
<span>= 3(Summation of r from 1 to 333) </span>
<span>= 3((1 + 333)(333/2)) </span>
<span>= 3(334)(333/2) </span>
<span>= 3(167)(333) </span>
<span>= 166833 </span>
<span>Edit: Opps, I forgot that you ask about an equation. </span>
<span>The sum of 1 + 2 + 3 + 4 + ... + n, where n is some integer, is: </span>
<span>(First term + Last term) multiplied by (Total number of terms / 2) </span>
<span>= (1 + n)(n / 2)</span>
Answer:
its the last one if not that then the 3rd one
Step-by-step explanation: