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3 years ago

On a map, if one centimeter represents 25 kilometers, how many kilometers does 7 centimeters represent?

Mathematics

1 answer:

Elena-2011 [213]3 years ago

4 0

Answer:

x = 175 km

Step-by-step explanation:

We can use ratios to solve this problem. Put the map distance over the real life distance.

1 cm 7 cm

-------- = ---------

25 km x km

Using cross products.

1 * x = 7 * 25

x = 175 km

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3 years ago

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4 years ago

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4 years ago

Read 2 more answers

What is the exact perimeter of kite ? Show your work.

Afina-wow [57]

Answer:

The perimeter of the kite is 29 units.

Step-by-step explanation:

1. Let's use the Pythagorean Theorem to find the perimeter of the kite:

With the information given, we have four right triangles with a new point A, intersecting UW and VX. Those triangles are:

Δ UVA

Δ VWA

Δ UXA

Δ XWA

As we can see in the figure, length of UV and VW is the same and the length of UX and WX is also the same.

2. Let's find the value of UV and VW

UV is the hypotenuse of Δ UVA and it sides are 3 and 4 units length. So, we can calculate the length of UV this way:

Length of UV ² = UA ² + VA ²

Replacing with the real values:

Length of UV ² = 3 ² + 4 ²

Length of UV ² = 9 + 16

Length of UV ² = 25

√Length of UV ² = √25

Length of UV = 5 units ⇒ Length of VW = 5 units

3. Let's find the value of UX and WX

UX is the hypotenuse of Δ UXA and it sides are 3 and 9 units length. So, we can calculate the length of UX this way:

Length of UX ² = UA ² + XA ²

Replacing with the real values:

Length of UX ² = 3 ² + 9 ²

Length of UX ² = 9 + 81

Length of UV ² = 90

√Length of UV ² = √90

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4. Let's calculate the perimeter of the kite:

Perimeter of the kite = UV + VW + WX + UX

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Perimeter of the kite = 29 units

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