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soldier1979 [14.2K]
3 years ago
12

After you prove that two triangles are congruent, what would CPCTC be useful for?

Mathematics
1 answer:
Lapatulllka [165]3 years ago
6 0
Is useful<span> in </span>proving<span>various theorems about </span>triangles<span> and other polygons.

</span>
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Which expression equals 6x − 5y + 2 − 8x + 3( y + 5)? A) 3x − 2y + 17 B) −3x + 2y + 17 C) −2x − 2y + 17 D) −2x − 2y − 17
inysia [295]

Answer:

<u>C) −2x − 2y + 17</u>

Step-by-step explanation (PEMDAS):

First, we do <u>3 (y + 5)</u> because of the parenthesis:

6x − 5y + 2 − 8x + 3y + 15

Since there are no exponents, multiplication ,or division, we will add and subtract. But we have to make sure we <u>combine like terms</u>. X with X's, Y with Y's and constants with constants. And ALWAYS go from left to right

6x − 5y + 2 − 8x + 3y + 15

<u>−2x</u> − 5y + 2 + 3y + 15

−2x <u>− 2y</u> + 2 + 15

<em>−2x − 2y</em><em> </em><em>+ </em><em><u>17</u></em><em>.</em>

8 0
4 years ago
C + d = 60<br> 2.5c + 1.75d = 123.75
likoan [24]

Answer:

  (c, d) = (25, 35)

Step-by-step explanation:

Multiply the first equation by 2.5 and subtract the second one:

  2.5(c +d) -(2.5c +1.75d) = 2.5(60) -(123.75)

  0.75d = 26.25 . . . . . . . . . simplify

  26.25/0.75 = d = 35 . . . . divide by the coefficient of d

  60 -d = c = 25 . . . . . . . . . use the first equation to find c

(c, d) = (25, 35)

3 0
3 years ago
What will you choose 1dollar or 100dollar
puteri [66]

Answer:

100 dollar

Step-by-step explanation:

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4 0
2 years ago
Read 2 more answers
Mary scored 28 points, which is twice as many points as Lashawna scored. Let L represent the points Lashawna scored.
Basile [38]

Answer: Lashawna scored 14 points

Step-by-step explanation:

Let M = Mary's score

L = Lashawna score

M = 28 points

And M is twice as much as L score

M= 2L

L= M/2

L= 28/2

M = 14.

Lashawna score was 14 points

8 0
4 years ago
explain why you can or cannot figure out the shape of a tank if you only know how many gallons it holds
jolli1 [7]
You certainly cannot. This is because you can really only determine size from how many gallons it holds, and shape can differ as long as it can hold the amount needed. Hope this helps.
7 0
3 years ago
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