Using the combination formula, it is found that there are 84 ways to choose the three tiles.
The order in which the tiles are chosen is not important, hence the <em>combination formula</em> is used to solve this question.
<h3>What is the combination formula?</h3>
is the number of different combinations of x objects from a set of n elements, given by:

In this problem, three tiles are chosen from a set of nine, hence:

There are 84 ways to choose the three tiles.
More can be learned about the combination formula at brainly.com/question/25821700
Answer:
1
Step-by-step explanation:
See pic for steps :)
There were 70 people who took the survey. 210 / 70 = 3. So, whatever 40 - 10 is, if we multiply by three, we get the answer. 40 - 10 = 30. 30 x 3 = 90. Simple as that. Hope I could help!
rrriok, the house of... idk
Answer:
x > -1
Step-by-step explanation:
Answer:
The area of the green polygon is 81.
The area of the yellow polygon is 3.
Step-by-step explanation:
To get the green polygon, simply multiply 9 by 9. (The sides)
To get the yellow polygon, first you have to find the height. We know that the side of the green polygon is 9, so you have to do 9-7 to find the height of the triangle. That is 2
Then to find the area, use the equation:
. The h would be 2 and b would be 3.
The answer is 3.
ask if you have questions!