Please help me with the math please?

Mathematics

2 answers:

Oxana [17]3 years ago

8 0

Answer:

count how many flowers there are on number 1

andre [41]3 years ago

4 0

Answer:

okay so 3. equals 20

4. 1st one 2nd one 3rd one equals 30

5. first one 2nd one 3rd one equals 30

6. first one second one equals 20

7. first one second one equals 20

Step-by-step explanation:

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Using the following equation, find the center and radius of the circle. You must show all work and calculations to receive credi

Vikki [24]

The equation of the circle: $(x-a)^2+(y-b)^2=r^2$

where:
(a; b) - coordinates of the center
r - a radius

Use: $(a\pm b)^2=a^2\pm2ab+b^2\ \ \ \ (*)$

We have:

$x^2-4x+y^2+8y=-4\\\\x^2-2x\cdot2+y^2+2y\cdot4=-4\ \ \ |add\ 2^2\ and\ 4^2\ to\ both\ sides\\\\\underbrace{x^2-2x\cdot2+2^2}_{(*)}+\underbrace{y^2+2y\cdot4+4^2}_{(*)}=-4+2^2+4^2\\\\(x-2)^2+(y+4)^2=-4+4+16\\\\(x+2)^2+(y-4)^2=16\\\\(x+2)^2+(y-4)^2=4^2$

Answer:
The center: (-2; 4)
The radius: r = 4

7 0

4 years ago

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nignag [31]

Let me know if you don’t understand anything. Hope this helped.