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LenKa [72]
3 years ago
9

Did I put the correct answer? Please let me know ASAP! See the attachment.

Mathematics
1 answer:
Nataliya [291]3 years ago
8 0
Yes the answer is correct
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How many different isosceles right triangles can be formed from three dots in the grid below? Two examples are shown.
oksano4ka [1.4K]

Answer:

  28

Step-by-step explanation:

The attached figure shows 7 triangles (counting the original 2). Each has degree-4 rotational symmetry about the center of the figure, so there can be 7×4 = 28 triangles.

8 0
3 years ago
Cuál es el número que no pertenece a esta sucesión 99 koma 105 koma 111 koma 117 koma 123 koma 129 koma 135 koma 141 koma 147 ko
vladimir1956 [14]

Based on the calculations, all of the numbers belong to this arithmetic sequence.

<h3>How to calculate an arithmetic sequence?</h3>

Mathematically, the nth term of an arithmetic sequence can be calculated by using this expression:

a_n = a_1 +(n-1)d

<u>Where:</u>

  • d is the common difference.
  • a₁ is the first term of an arithmetic sequence.
  • n is the total number of terms.

Next, we would determine the common difference as follows:

d = a₂ - a₁

d = 105 - 99 = 6.

d = a₃ - a₂

d = 111 - 105 = 6.

d = a₄ - a₃

d = 117 - 111 = 6.

Based on the calculations, all of the numbers belong to this arithmetic sequence.

Read more on arithmetic sequence here: brainly.com/question/12630565

#SPJ1

Complete Question:

What is the number that does not belong to this sequence 99, 105, 111, 117, 123, 129, 135, 141, 147, 153

6 0
2 years ago
Pablo is running a 15.5-kilometer race.
Montano1993 [528]
It would be answer D
5 0
3 years ago
9(2k+3)+2=11(k-y) help please and fast and show work, ty! Btw I’m being timed please help..
mel-nik [20]
9(2k+3)+2=11(k-y)
18k + 27 + 2 = 11k - 11y
18k + 29 = 11k - 11y
18k - 11k + 29 = 11k - 11y - 11k
7k + 29 = -11y
7k + 29 - 29 = -11y - 29
7k = -11y - 29
7k / 7 = -11/7y - 29/7
K = -11/7y - 29/7
3 0
3 years ago
The area of a circle is 19.7cm². what is the radius?​
Luba_88 [7]

Step-by-step explanation:

area of a circle = 19.7cm²

πr²= 19.7cm²

22/7 r²= 19.7

r= 2.50 cm

3 0
2 years ago
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