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2 years ago

Help please. Having some trouble with this question

Mathematics

1 answer:

xeze [42]2 years ago

5 0

Answer:

The answer to your question is 55 ft

Step-by-step explanation:

Data

Person's height = 5 ft

Person's shadow = 10 ft

Tree's height = ?

Tree's shadow = 110 ft

- Use the Thales' theorem to solve this problem

Person's height / Person's shadow = Tree's height / Tree's shadow

- Substitution

5 / 10 = x / 110

-Solve for x

x = 5 (110) / 10

-Simplification

x = 550 / 10

-Result

x = 55 ft

-Conclusion

The tree is 55 ft height

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NARA [144]

Answer:

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Step-by-step explanation:

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2 years ago

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vlabodo [156]

Step-by-step explanation:

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2 years ago

Solve the system using elimination. –10x – 3y = –18 –7x – 8y = 11

Naily [24]

ANSWER

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EXPLANATION

The given system is :

First equation:

$- 10x - 3y = - 18$

Second equation:

$- 7x - 8y = 11$

Let us multiply the first equation by 7 to get,

Third equation;

$- 70x - 21y = - 126$

Let us multiply the second equation too by 10 to get,

Fourth equation:

$- 70x - 80y = 110$

Subtract the fourth equation from the third equation:

$- 21y + 80y = - 126 - 110$

$59y = -236$

Divide both sides by 59.

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Put y=-4 into the second equation and solve for x.

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$- 7x = 11 - 32$

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$x = 3$

The solution is x=3, y=-4

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