3 years ago

What is the center and radius of the circle that has the equation (x + 7)^2 + (y - 4)^2 ? Explain.

Mathematics

1 answer:

lesya [120]3 years ago

7 0

Answer:

(-7, 4) and 7

Step-by-step explanation:

The standard equation of a circle is expressed as (x - a)^2 + (y - b )^2 = r^2

Where the center is the point (a, b) and the radius is r

Note: simply inserting the variables and playing around with your signs gives you the value for (a and b)

The square root of the radius gives you the value for r

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Tatiana [17]

A²+b²=c²
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3 years ago

The deli server put 0.25 pound (lb) of meat on each sandwich. She used the equation 0.25s = 50 to determine the number of sandwi

LenKa [72]

200 is the value of s

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Find the range of the data set: 7, 12, 15, 4, 23, 15, 25, 9<br> A. 4<br> B. 9<br> C. 19<br> D. 21

UkoKoshka [18]

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Step-by-step explanation:

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2 years ago

Read 2 more answers

Need quick help with this math best answer gets brainliest

frosja888 [35]

$\frac{1}{2} x+6(x+15)=12\\\\\frac{1}{2} x+6x+90=12\\\\6\frac{1}{2} x+90=12\\6\frac{1}{2} x=-78\\x=-12$

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6 0

2 years ago

A poll shows that 41% of voters in a city favor of a $0.01 tax increase. If 25 voters are selected at random, what is the probab

DanielleElmas [232]

Answer:

2.6% (Approx)

Step-by-step explanation:

Given:

Number of favor voter = 41% = 0.41

Random selected voters = 25

Exact favor voter = 15

Find:

Probability that exactly 15 will in favor.

Computation:

Number of non-favor voter = 1 - 0.41 = 0.59

Given question is a combination problem.

⇒ ²⁵C₁₅ × 0.41¹⁵ × 0.59¹⁰ =

⇒ 0.02598130

= 2.6% (Approx)

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3 years ago