Answer:
(-5, 3)
Step-by-step explanation:
Let O(x, y) be the centroid of the triangle.
The median of a triangle is a line segment that joins the vertex of a triangle to the midpoint of the opposite side. There are three medians in a triangle; and the medians of a triangle intersect at a point called the centroid.
The centroid of a triangle is gotten from the average of the x coordinates and the y coordinates of all the three vertices.
For Triangle ABC has vertices A (3,-3) B (-7,9) C (-11,3) and centroid O(x, y). Hence:
The centroid is at (-5, 3)
Answer:
x = 1
Step-by-step explanation:
5x + 17 = 1/2[(73x + 5) - (23x - 5)]
5x + 17 = 1/2[37x + 5 - 23x + 5]
5x + 17 = 1/2[14x + 10]
5x + 17 = 1/2 * 2(7x + 5)
5x + 17 = 7x + 5
5x - 17x = 5 - 17
-12x = - 12
x = - 12/-12
x = 1
X=5 if you solve the equation 20=8x/2
<span> First subtract how tall it was 7 1/2 years ago from how tall it is now.
57 - 40 1/2 =</span>
<span />57 - 40.5 = 16.5 or 16 1/2
<span>So in the 7 1/2 years the tree grew 16 .5 or 16 1/2 feet. To get the average yearly growth for the 7 1/2 year period you have to divide the 16 1/2 feet by 7 1/2 years.</span>
<span>It makes it much easier if you change the fractions to decimals. </span>
<span>16 1/2 = 16.5</span>
<span>7 1/2 = 7.5</span>
<span>16.5 ÷ 7.5 = 2.2 or 2 1/5 feet per year</span>
<span>Hope this helps. :)</span>
A, and b are correct. c could be but, it is not summer all over the world. for d it is Boston, Massachusetts (city,state)
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