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jeka57 [31]
2 years ago
9

Y varies directly with X. Y=10 when X=5, find y when X=14

Mathematics
1 answer:
Nataliya [291]2 years ago
5 0

Answer:

28

Step-by-step explanation:

y=kx

10=5k

k=2

y=2×14

y=28

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Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long train. The automatic hopper c
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Answer:

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Step-by-step explanation:

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The fourth term of an Arithmetic Sequence is equal to 3 times the first term, and the seventh term exceeds twice the third term
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Answer:

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Step-by-step explanation:

The first term is x.

The common difference is d.

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4th term: x + 3d

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"The fourth term of an Arithmetic Sequence is equal to 3 times the first term"

x + 3d = 3 * x       Eq. 1

"the seventh term exceeds twice the third term by 1"

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2x = 4d - 2

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Since 2x = 2x, then the right sides are equal.

3d = 4d - 2

d = 2

2x = 3d

2x = 3(2)

2x = 6

x = 3

Answer: The first term is 3. The common difference is 2.

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