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Anton [14]
3 years ago
14

Determine whether (1,1) and (-1,4) are solutions to 2x+5y<7

Mathematics
1 answer:
kramer3 years ago
4 0

Answer:

Step-by-step explanation:

1,1 is a solution

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A circle has its center at (1,4) and a radius of 2 units what is the equation of the circle
joja [24]

Answer: x² + y² - 2x - 8y + 13 = 0

Step-by-step explanation:

the equation of the circle is in the form (x - a)² + (y - b)² = r²

where (a,b) is the center of the circle and r is the radius

      hence the equation is

                         (x - 1)² + (y - 4)² = 2²

                         x²-2x+1+y²-8y+16= 4

                         x²+ y² -2x- 8y + 17 =4

                         x² + y² - 2x - 8y = -13

                          x² + y² - 2x - 8y + 13 = 0

3 0
4 years ago
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Tyler is building a fish tank in the shape of a sphere that has a diameter of 18 inches. Based on Tyler's research, it is recomm
Karo-lina-s [1.5K]

Answer: 4 fishes

Step-by-step explanation:

Hi, to answer this question we have to apply the next formula:  

Volume of a sphere = 4/3 x π x (diameter/2)^3  

Replacing with the values given:  

V = 4/3 x π x (18/2)^3  

v = 4/3 x π x (9)^3 = 3,053.63 in3  

Next, we have to divide the volume of the tank by 693 in3 (volume for each fish)

3,053.63/693 =4.40 = 4 fishes

Feel free to ask for more if needed or if you did not understand something.  

7 0
4 years ago
X - y = 4<br><br> 2x + y = -4<br><br> x = y =
Aleks04 [339]

Answer:  x = 4 + y

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8 0
3 years ago
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6 0
3 years ago
Wilma and Betty are playing a number game. Wilma tells Betty, "I'm thinking of a number between 1 and 10. If I take the number a
Ilia_Sergeevich [38]
Just work this problem out backwards. First write out an equation.
(x+4)•3=30

Now solve :

(x+4)•3=30

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3x=18
/3   /3

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8 0
3 years ago
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