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arlik [135]
3 years ago
5

10 less than a number is the same number doubled. What is the number?

Mathematics
1 answer:
slega [8]3 years ago
5 0

Answer:

-10

Step-by-step explanation:

Let x = number

10 less than a number is the same number doubled

x-10 = 2x

Subtract x from each side

x-10-x = 2x-x

-10 = x

The number is -10

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Use the distance formula to calculate the length of the leg CD
Karo-lina-s [1.5K]

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d=\sqrt[]{(x_1-x_2)^2+(y_1-y_2)^2}

Where

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(x₂,y₂) are the coordinates of the second point.

To determine the length of CD, the first step is to determine the coordinates of both endpoints from the graph

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D(-1,-2)

Replace the coordinates on the formula using C(2,-1) as (x₁,y₁) and D(-1,-2) as (x₂,y₂)

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