Answer:
Step-by-step explanation:
This is about sums.
Use the numbers in the table to find respective sums.
1. Sum of all fi
- ∑fi = 3 + 5 + 7 + 8 + 12 + 10 = 45
2. Sum of all xi
- ∑xi = -2 + 5 + 4 - 3 + 7 + 6 = 17
3. Sum of all yi
- ∑yi = 3 + 3 - 7 + 2 - 5 - 1 = - 5
4. Sum of fi*xi
- ∑(2 to 4)fi*xi = 5*5 + 7*4 + 8*(-3) = 29
5. Sum of (xi + yi)
- ∑(1 to 3)(xi + yi) = (-2 + 3) + (5 + 3) + (4 - 7) = 6
10/8 cannot be expressed as a whole number because there will always be a remainder after the quotient is gotten.
The mixed number: 10/8=5/4
=1 1/4
The two triangles are similar by the AA Similarity theorem.
The height of the tree can be calculated by figuring out the ratio between the distance between the mirror to her feet and the distance from the mirror to the tree
<h3>How to use the concept of similar Triangles?</h3>
From Law of Reflection, we know that the angle of incidence and the angle of reflection are equal to each other.
Now, triangles can be proved similar by the AA, SAS, or SSS theorems. However, in this question, the triangles as seen in the attached image can be proved similar by the AA similarity theorem.
This is because both triangles have one congruent angle in common.
Sarah and the tree are standing straight and perpendicular to the ground and as such, the angles formed by Sarah and the tree are right angles.
The above tells us that the two triangles have two angles in common, making them similar triangles by the AA (Angle Angle) similarity theorem.
Since the triangles are similar, it means that the ratios of the sides of the triangles will be the same. Thus, if Sarah knows the distance from the mirror to her feet and the distance from the mirror to the tree, she can create the ratio between the two triangles.
Read more about Similar Triangles at; brainly.com/question/14285697
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Answer:
cool
Step-by-step explanation:
Answer:
well you cant buy it in 3 months because that would equal 1,200$
so you would need 300$ more to buy the sound system
Step-by-step explanation:
Hope this Helps