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maks197457 [2]
3 years ago
6

Tessssttttt!!!! ASAP Anwser. 50 COoinnss PLZ Help Can some plz help me with this! I have two attempts on this test. I used one a

nd can go for another. I just need this answer. Plleeeaaassssse.

Mathematics
2 answers:
GaryK [48]3 years ago
4 0
It should be ABC because an equilateral triangle is a triangle in which all three sides have the same length which is apparent in ABC and not the others. Hope this is right!
skad [1K]3 years ago
3 0

Answer:

i believe its c but im not sure

Step-by-step explanation:

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(6ab-8a+8) - (7ab-1 )
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Answer:

- ab - 8a + 9

Step-by-step explanation:

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myrzilka [38]

Answer:

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4 0
3 years ago
Sabendo que "K" satisfaz a equação {2(k-8) + 3(-k+1) = -4k +11} Os valores reais de x que satisfazem a equação 15x² - kx + 1 = 0
erastova [34]

Answer:

D) 1/5 e 1/3

Step-by-step explanation:

You have the following quadratic equation:

15x^2-kx+1=0           (1)

In order to find the values of x that are solution to the equation (1), you first find the solution for k in the following equation:

2(k-8)+3(-k+1)=-4k+11\\\\2k-16-3k+3=-4k+11\\\\2k-3k+4k=11+16-3\\\\3k=24\\\\k=8

Next, you replace the previous value of k in the equation (1) and you use the quadratic formula to find the roots:

15x^2-8x+1=0\\\\x_{1,2}=\frac{-(-8)\pm \sqrt{(-8)^2-4(15)(1)}}{2(15)}\\\\x_{1,2}=\frac{8\pm 2}{30}\\\\x_1=\frac{1}{5}\\\\x_2=\frac{1}{3}

Then, the roots of the equation (1) are

D) 1/5 e 1/3

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3 years ago
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