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kozerog [31]
4 years ago
15

You please help me with this problem I’ll give you brainless

Mathematics
2 answers:
leva [86]4 years ago
7 0

Answer:

C

Step-by-step explanation:

-27 -(-38)

when you subtract a negative it turns into addition

-27+38

Setler79 [48]4 years ago
4 0

Answer:

c) -27 +38

Step-by-step explanation:

the reason is because when a number is in parentheses, especially if they are negatives, they become the opposite which in this case is + so -(-38) can be the same as saying -1 × -38 and since they are both negatives, the sign becomes positive and it's just 38 while the 27 isn't affected because there's nothing in front of it I hope I helped.

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What is the equation of the parabola with focus (-1,-1) and directrix y=1?
Inessa05 [86]

Answer:

B

Step-by-step explanation:

Given focus as (h,k) and directrix as y = mx + b, the equation of a parabola is given as:

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Hence, from the given focus & directrix, we have:

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<em>We can plug them into the formula and arrange to get:</em>

<em>\frac{(y - mx - b)^2}{m^2 +1}=(x - h)^2 + (y - k)^2\\\frac{(y - (0)x - 1)^2}{0^2 +1}=(x - (-1))^2 + (y - (-1))^2\\\frac{(y-1)^2}{1}=(x+1)^2+(y+1)^2\\y^2-2y+1=x^2+2x+1+y^2+2y+1\\-2y-2y=x^2+2x+1\\-4y=x^2+2x+1\\y=-\frac{1}{4}x^2-\frac{1}{2}x-\frac{1}{4}</em>

<em />

<em>B is the correct answer.</em>

8 0
3 years ago
If one leg of a right triangle is 6 units and the other leg is 8 units, what is the length of the hypotenuse. {in units}
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Answer:

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Step-by-step explanation:

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we do what it shows us and get:

36+64=c^2

from there, we add the left side altogether then square each side to get rid of the root.

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√100=√c^2

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Step-by-step explanation:

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Step-by-step explanation:

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