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VARVARA [1.3K]
3 years ago
11

Need help please can someone figure it out ​

Mathematics
1 answer:
babunello [35]3 years ago
6 0

Answer:

It's the first choice.

Step-by-step explanation:

Using system of equations.

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The answer it is 2.5
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Which of the following are independent events?
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7 0
3 years ago
44 points! Brainliest for correct answer!
Art [367]

Answer:

5n + 25q = 200 - - - (1)

n = 5q - - - (2)

q = 40

n = 5(40) = 200

Step-by-step explanation:

Number of Nickels = n

Number of Quarters = q

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Nickel = 5 cent

Quarter = 25 cent

5n + 25q = 200 - - - (1)

n = 5q - - - (2)

5(5q) + 25q = 200

25q + 25q = 200

50q = 200

q = 200/5

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5 0
3 years ago
In the xy-plane, the graph of x2 − 4x + y2 − 6y = −8 is a circle. What is the radius of the circle?
Blizzard [7]

The center-radius form of the circle equation

(x-h)^2+(y-k)^2=r^2

(h, k) - center

r - radius

We have:

x^2-4x+y^2-6y=-8

Use

(a-b)^2=a^2-2ab+b^2\qquad(*)

x^2-2(x)(2)+y^2-2(y)(3)=-8\qquad\text{add}\ 2^2\ \text{and}\ 3^2\ \text{to both sides}\\\\\underbrace{x^2-2(x)(2)+2^2}_{(*)}+\underbrace{y^2-2(y)(3)+3^2}_{(*)}=2^2+3^2-8\\\\(x-2)^2+(y-3)^2=4+9-8\\\\(x-2)^2+(y-3)^2=5\\\\(x-2)^2+(y-3)^2=(\sqrt5)^2\\\\Answer:\\\\\boxed{center:(2,\ 3)}\\\\\boxed{radius:r=\sqrt5}

4 0
3 years ago
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