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solmaris [256]
3 years ago
12

There are 18 girls and 12 boys in your class. What is the probability that a new kid entering your class will be a boy ?

Mathematics
1 answer:
xenn [34]3 years ago
6 0
C.
12/30=0.4
You should really learn how to do probabilities. They don't go away after like the sixth grade.
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Find the coordinates of the centroid of the triangle with the given vertices. (Lesson 5-2)
marysya [2.9K]

The triangle with vertices located at A(1 , 7), B(4 , 2), and C(7 , 7) has its centroid located at (4 , 16/3).

The centroid of a triangle is the point inside the triangle where the three medians intersect. The median of a triangle is the line the connects the midpoint of a side and the opposite vertex.

To get the centroid of a triangle, use the formula given by:

C(x , y) = [(x1 + x2 + x3)/3 , (y1 + y2 + y3)/3]

where C is the centroid of the triangle located at (x , y)

x1, x2, and x3 are the x-coordinate of the vertices of the triangle

y1, y2, and y3 are the y-coordinate of the vertices of the triangle

Let Point 1(x1 , y1) =  A(1 , 7)

Point 2(x2 , y2) = B(4 , 2)

Point 3(x3 , y3) = C(7 , 7)

Plug in the values in the formula.

C(x , y) = [(x1 + x2 + x3)/3 , (y1 + y2 + y3)/3]

C(x ,y) = [(1 +4 + 7)/3 , (7 + 2 + 7)/3]

C(x ,y) = (12/3 , 16/3)

C(x ,y) = (4 , 16/3)

Learn more about centroid of triangle here: brainly.com/question/7644338

#SPJ4

5 0
1 year ago
A. Rotation of 180º and then a reflection across the x-axis.
Trava [24]

C.

Hope this helps!

Please vote brainliest

3 0
3 years ago
Deb has a board that measures 5 feet in length how many 1/4 Foot long pieces can deb cut from the board.
uranmaximum [27]
Deb can cut 20 pieces from the board
3 0
3 years ago
Find the value of x that will allow you to prove that CD below is parallel to EF if the measure of 21 is
irina1246 [14]

Answer:

23

Step-by-step explanation:

According to the diagram, two sum of <1 and <2 is 180 degrees

Hence 3x+30+81 = 180

3x+111 = 180

3x =180-111

3x = 69

x = 69/3

x = 23

8 0
3 years ago
Solve x^2 – 12x + 36 = 90 for x
Gnesinka [82]
X^2-12x+36=90
x^2-12x-64=0
factor: (x-16)(x+4)=0
by the zero product theorem,
x-16=0 or x+4=0
=> 
x=16 or x=-4
6 0
3 years ago
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