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AnnyKZ [126]
2 years ago
6

Jackson places the mirror on the ground so that he is able to look at the mirror and see the top of the mountain.

Mathematics
1 answer:
SOVA2 [1]2 years ago
6 0

Answer:

  50'8"

Step-by-step explanation:

In this scenario, the height of the object is proportional to its distance from the mirror. The mountain is 40'/5' = 8 times as far from the mirror as Jackson, so it will be 8 times as tall as Jackson:

  8 × 6'4" = 48'32" = 50'8"

The mountain is 50 feet 8 inches tall.

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Two times x is 8 more than y. The sum of x and two times y is 14. Write two equations and graph to find the value of y.
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Option B: $y=4$ is the value of y

Explanation:

It is given that "Two times x is 8 more than y". Writing it as expression, we have,

2x=8+y

It is also given that "The sum of x and two times y is 14". Writing it as expression, we have,

x+2y=14

To find the value of y, let us solve the two equations using substitution method.

From the equation 2x=8+y , let us find the value of x.

x=\frac{8+y}{2}

x=\frac{8}{2} +\frac{y}{2}

x=4+\frac{y}{2}

Now, substituting x=4+\frac{y}{2} in the equation x+2y=14 , we get,

4+\frac{y}{2}+2y=14

      4+\frac{5y}{2} =14

            $\frac{5 y}{2}=10$

            5y=20

              $y=4$

Thus, the value of y is $y=4$

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3 years ago
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Step-by-step explanation:

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