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inessss [21]
3 years ago
7

sally and marta Had the same number of postcards. After sally sold 18 of her postcards,Marta had 4 times as many post cards as s

ally How many post cards did each girl have to begin with?
Mathematics
1 answer:
bekas [8.4K]3 years ago
5 0
The answer is 20 okay
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Write the standard equation of the circle with the given center and passes through the given point. Center (7,-2); Point= (1,-6)
vodomira [7]

Answer:

(x - 7)² + (y + 2)² = (2√13)²

Step-by-step explanation:

We already know that the center is at (7, -2), but must find the radius.  The radius is the distance between the points (7, -2) and (1, -6):

r = √ [6² + 4²] ) = √(36 + 16) = √52 = √4√13 = 2√13.

Then the desired equation is (x - 7)² + (y + 2)² = (2√13)²

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2 years ago
What is the distance between the two points loacted at 3 , 8 and 10 , 8
damaskus [11]

Answer:

Step-by-step explanation:

d=(10-3)^2+(8-8)^2=(7)^2+(0)^2=49

since it is in radical the the answer is 7

4 0
3 years ago
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posledela
11/3.14 aka pi = 3.50141
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I don’t know at all lol
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3 years ago
Lots of points helppppppppp manipulate formulas
Bingel [31]
Hey there ..
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