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cricket20 [7]
3 years ago
15

-18 (-3) answer explain

Mathematics
1 answer:
Temka [501]3 years ago
3 0

Answer:

54

Step-by-step explanation:

18(3) = 18+18+18 = 54

But remember that we have two negatives

When you multiply two negative numbers, they become positive, therefore your answer is 54

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a chord of 12cm long of 8cm is away from the of the circle what is the lenght of the chord which is 6cm away from the centre
lana66690 [7]

Answer:

The length of the chord is 16 cm

Step-by-step explanation:

Mathematically, a line from the center of the circle to a chord divides the chord into 2 equal portions

From the first part of the question, we can get the radius of the circle

The radius form the hypotenuse, the two-portions of the chord (12/2 = 6 cm) and the distance from the center to the chord forms the other side of the triangle

Thus, by Pythagoras’ theorem; the square of the hypotenuse equals the sum of the squares of the two other sides

Thus,

r^2 = 8^2 + 6^2

r^2= 64 + 36

r^2 = 100

r = 10 cm

Now, we want to get a chord length which is 6 cm away from the circle center

let the half-portion that forms the right triangle be c

Using Pythagoras’ theorem;

10^2 = 6^2 + c^2

c^2 = 100-36

c^2 = 64

c = 8

The full

length of the chord is 2 * 8 = 16 cm

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3 years ago
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GenaCL600 [577]

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its a apartment thats just one big room

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You start at 1, 4. You move left five units and down seven units. where do you end?
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Simplify: square root of 81+18<img src="https://tex.z-dn.net/?f=%5Csqrt%7B7%7D" id="TexFormula1" title="\sqrt{7}" alt="\sqrt{7}"
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\sqrt{81 \:  +  \: 18 \sqrt{7}  \:  +  \: 7}

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\sqrt{(9 \:  +  \:  \sqrt{7} ) ^{2} }

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\boxed{ \bold{9 \:  +  \:  \sqrt{7} }}

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Answer:

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Step-by-step explanation:

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