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ExtremeBDS [4]
3 years ago
15

Solve for x please describe the steps 50 points

Mathematics
1 answer:
LuckyWell [14K]3 years ago
8 0

Answer:

x = 6

explanation:

USE: \boxed{\frac{side-length }{base -length} = \frac{side-length}{base -length} }

solve:

\frac{21}{15} = \frac{7}{x-1}

21(x-1) = 7(15)

21x-21 = 105

21x = 105+21

21x = 126

x = \frac{126}{21}

x = 6

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Required

Determine if there's a direct variation between the number and its position

I'll start by giving an illustration of how the triangle is represented using stars (*)

*

**

***

****

*****

Represent the line number with y and it's position with x

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On line 2:

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Direct variation is represented by

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