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Stels [109]
3 years ago
7

Find the area of the square with the side length of 2x+5

Mathematics
1 answer:
zimovet [89]3 years ago
8 0
4x^2 +20x +25
(2x+5)(2x+5)
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PLEASE HELP! A positive number is 1/3 of another number. The sum of the numbers is five less than the square of the larger numbe
antoniya [11.8K]

Answer: The numbers are 1 and 3.

Step-by-step explanation:

Let x = smaller number , y= larger number.

As per given,

x=\dfrac{y}{3}   ...(i)

x+y=y^2-5       ...(ii)

Put value of x from (i) in (ii)

\dfrac{y}{3}+y=y^2-5\\\\\Rightarrow\ \dfrac43y=y^2-5\\\\\Rightarrow\ 3y^2-4y-15=0\\\\\Rightarrow\ 3y^2-9y+5y-15=0\\\\\Rightarrow\ 3y(y-3)+5(y-3)=0\\\\\Rightarrow\ (y-3)(3y+5)=0\\\\\Rightarrow\ y=3 \ \ or\ y=\dfrac{-5}{3}

Since numbers are positive , so y=3 is correct.

And x will be 1  [from (i)]

Hence, the numbers are 1 and 3.

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Ahmet is twice as old as his sister Betul, and the sum of their ages is 36. How old is Ahmet?
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18??
two times as old.
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In the diagram, lines JK and LM at N, M MNK = 2x + 30.<br> What is the value of x?
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the valu of x is 15 .....

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