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Murrr4er [49]
3 years ago
5

Which expression is equal to 4y?

Mathematics
2 answers:
creativ13 [48]3 years ago
6 0
That is the last one
jst count the number of y's





3y/8 I would say is 3 times y divided by 8
so last option



pemdas
so multily first
4 times 5=20
now we has 34+20 to get 54
alekssr [168]3 years ago
6 0

Que Por Favor? Oh no

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In triangle $ABC$, let angle bisectors $BD$ and $CE$ intersect at $I$. The line through $I$ parallel to $BC$ intersects $AB$ and
Umnica [9.8K]

Answer:

41

Step-by-step explanation:

If you work through a series of obscure calculations involving area and the radius of the incircle, they boil down to a simple fact:

... For MN║BC, perimeter ΔAMN = perimeter ΔABC - BC = AB+AC

.. = 17+24 = 41

_____

Wow! Thank you for an interesting question with a not-so-obvious answer.

_____

<em>A little more detail</em>

The point I that you have defined is the incenter—the center of an inscribed circle in the triangle. Its radius is the distance from I to any side, such as BC, for example.

If we use "Δ" to represent the area of the triangle and "s" to represent the semi-perimeter, (AB+BC+AC)/2, then the incircle has radius Δ/s. The area Δ can be computed from Heron's formula by ...

... Δ = √(s(s-a)(s-b)(s-c)) . . . . where a, b, c are the side lengths

For this triangle, the area is Δ = √38480 ≈ 196.1632 units². That turns out to be irrelevant.

The altitude to BC will be 2Δ/(BC), so the altitude of ΔAMN = (2Δ/(BC) -Δ/s). Dividing this by the altitude to BC gives the ratio of the perimeter of ΔAMN to the perimeter of ΔABC, which is 2s.

Putting these ratios and perimeters together, we get ...

... perimeter ΔAMN = (2Δ/(BC) -Δ/s)/(2Δ/(BC)) × 2s

... = (2/(BC) -1/s) × BC × s = 2s -BC

... perimeter ΔAMN = AB +AC

8 0
3 years ago
Seventy-three percent means the same as
Gwar [14]
Seventy-three percent is the same as 73% , .73 , and \frac{73}{100} .
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3 years ago
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Answer:

1. 1/6

2. 1/9

3. 1/10

4.it would still be 9/10

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I cant answer that one sorry

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4 (im a little less confident in  this one :( )

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1/4

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