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stepladder [879]
3 years ago
7

Write the equation in standard form for the circle with center (0, -6) and radius 7.

Mathematics
1 answer:
LUCKY_DIMON [66]3 years ago
4 0

Step-by-step explanation:

the equation of circle is given by

(x - h) {}^{2} + (y - k) {}^{2}  =  {r}^{2}  \\ (x - 0) {}^{2}  +  {(y + 6)}^{2}  =  {7}^{2}  \\  {x }^{2}  +  {y}^{2}  + 12y + 36 = 49 \\  {x  }^{2}  +  {y}^{2}  + 12y = 13

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4 years ago
Convert 120 kilometers per hour into miles per hour using dimensional analysis
musickatia [10]

Answer:

74.56 miles / h

Step-by-step explanation:

1 mile = 1.609 km

Using the dimensional analysis you multiply the number you want to convert by 1 (using a fraction with the needed units)

Since 1 mile = 1.609 km then:

1= \frac{1 mile}{1.609 km}

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4 years ago
8. Simplify 5mn2 - 8m + mn2.
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Answer:

Step-by-step explanation:

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3 years ago
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3 years ago
2x + 4y =450 4x + 2y = 420​
masya89 [10]

2x+4y=450

2x=450-4y

x=450-4y÷2----- equation 1

4x+2y=420

4x=420-2y

x=420-2y÷4----- equation 2

putting the value of x in equation 1

x=450-4y÷2

420-2y÷4=450-4y÷2

2(420-2y)=4(450-4y)

840-4y=1800-16y

840-1800=-16y-4y

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putting the value of y in equation1

2x+4y=450

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2x+320=450

2x=450-320

2x=130

x=130÷2

x=65

<h2> the value of x is 65 and y is 80</h2>
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3 years ago
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