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Anestetic [448]
3 years ago
8

Please help me out!!!!!!!!

Mathematics
1 answer:
qaws [65]3 years ago
5 0

Answer:

x = - 6

Step-by-step explanation:

Given that y varies directly as x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = - 9 when x = 3, thus

k = \frac{y}{x} = \frac{-9}{3} = - 3

y = - 3x ← equation of variation

When y = 18, then

18 = - 3x ( divide both sides by - 3 )

x = - 6

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Find the length of B to the nearest tenth using the Pythagorean theorem.​
fgiga [73]
The answer is 11.2

The Pythagorean Theorem says
a^2+b^2=c^2

From the picture, we know one side, and the hypotenuse.

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b^2=225
Sqrtb^2=sqrt225
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Rounded to the nearest tenth it is 11.2
4 0
3 years ago
find the value of the letter in each of the following and give reasons for the steps involved 1 2 A+6 A B=A 0 9​
nekit [7.7K]

Question:

Find the value of the letter in each of the following and give reasons for the steps involved:

1 2 A

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Answer:

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Step-by-step explanation:

Here, let's use the general form of numbers where any  letter must represent one value and each digit must be represented by just one letter.

Take the following:

A = 8

B = 1

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I.e, A = 1 + 6 + 1 = 8

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A = 8

B = 1

Therefore,

1 2 A

+ 6 A B =

A 0 9

Will be written as:

128 + 681 =  809

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Step-by-step explanation:

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Read 2 more answers
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