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masha68 [24]
3 years ago
9

Adição e subtração de equilateros

Mathematics
2 answers:
marta [7]3 years ago
7 0
??? All I can understand is the addition and subtraction, but what's the question
Harlamova29_29 [7]3 years ago
6 0
Addition and subtraction of an equilater of what?
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Jorge is designing a square poster. the poster has an area of 169in^2.what is the length of each side?
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Let \: the \: side \: of \: the \: poster \: be \: x\: (x>0) \\ \Rightarrow {x}^{2} = 169\Leftrightarrow x = 13 \\ \Rightarrow B. \: 13
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Read 2 more answers
Use Pythagorean theorem
kogti [31]

Answer:

15

Step-by-step explanation:

a^2+b^2=c^2

y^2+8^2=17^2

Step 1: Simplify both sides of the equation.

y^2+64=289

Step 2: Subtract 64 from both sides.

y^2+64−64=289−64

y^2=225

Step 3: Take square root.  

y=15  

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6(2x - 11) + 15 = 21

First step use distributive property on the left side to remove the parenthesis, to do this multiply 6 by each term inside the parenthesis:

12x - 66 + 15 = 21

Second step, simplify the left side by combining the like terms:

12x - 51 = 21

Third step, add 51 to both sides of the equation:

12x = 72

Last step, divide both sides by 12:

x = 72/12

x = 6

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