3 years ago

Sarah buys 5 rulers and 4 pens work out how much she will pay give your answer in £

Mathematics

1 answer:

Troyanec [42]3 years ago

8 0

Answer:

£550

Step-by-step explanation:

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What is the equation of the circle with center (-6,7) that passes through the point (4,-2). A. (x+6)^2+(y-7)^2=181 B. (x-6)^2+(y

pychu [463]

The equation of a cricle passing through (h,h) and with radius r is
$(x-h)^2+(y-k)^2=r^2$
so

cente ris (-6,7) and passing through (4,-2)
$(x-(-6))^2+(y-7)^2=r^2$
$(x+6)^2+(y-7)^2=r^2$
subsitute (4,-2) to find r^2

$(4+6)^2+(-2-7)^2=r^2$
$(10)^2+(-9)^2=r^2$
$100+81=r^2$
$181=r^2$

so it is

$(x+6)^2+(y-7)^2=181$
A is the answer

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3 years ago

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statuscvo [17]

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3 years ago

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professor190 [17]

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Answer:

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Step-by-step explanation:

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3 years ago

A 12 ft. rope is attached to the wall of a garage. A dog’s collar is attached to the end of the rope to allow him to safely stay

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Since it's a wall, I'm guessing it will only have access to half the circle? Therefore:

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Our case:

(π * 6²)/2 =

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3 years ago