PLEASE HELP ME

Mathematics

1 answer:

Citrus2011 [14]2 years ago

6 0

The answer is -15 yayaya

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Does the point (-4, 2) lie inside or outside or on the circle x^2 + y^2 = 25?

d1i1m1o1n [39]

Given equation of the Circle is ,

$\sf\implies x^2 + y^2 = 25$

And we need to tell that whether the point (-4,2) lies inside or outside the circle. On converting the equation into Standard form and determinimg the centre of the circle as ,

$\sf\implies (x-0)^2 +( y-0)^2 = 5 ^2$

Here we can say that ,

• Radius = 5 units

• Centre = (0,0)

Finding distance between the two points :-

$\sf\implies Distance = \sqrt{ (0+4)^2+(2-0)^2} \\\\\sf\implies Distance = \sqrt{ 16 + 4 } \\\\\sf\implies Distance =\sqrt{20}\\\\\sf\implies\red{ Distance = 4.47 }$

Here we can see that the distance of point from centre is less than the radius.

Hence the point lies within the circle .

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2 years ago

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What percent of the animals in the image are dogs?

Klio2033 [76]

Math:

7 dogs, 3 cats, 5 birds. In total, there are 15 animals all together.

So ignore the 3 and 5 those are in there to throw you off. To get the percentage, you do 7/15

So you'd get 0.4666667

Answer: 0.467
Rounded Answer: 0.47 (Or 47% B)

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2 years ago

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Find the value of 9u-2 given that -7u-7=7 ?

Yuliya22 [10]

Answer:

-20

Step-by-step explanation:

when you solve: -7u-7=7, you get u= -2 and when you plug it in you get this equation 9(-2)-2=?

then you get -20

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1 year ago