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oksian1 [2.3K]
2 years ago
5

Equivalent expression to x - 9 =4

Mathematics
2 answers:
Zigmanuir [339]2 years ago
8 0

Answer:

13

Step-by-step explanation:

x-9+9=4+9

x=13

Juli2301 [7.4K]2 years ago
5 0

Answer:X=13

Step-by-step explanation:13-9=4

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A side of the triangle below has been extended to form an exterior angle of 159°. Find the value of x
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Find the the angle by subtracting 159 from 180 that’s your answer= 21 degrees

Step-by-step explanation:

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Can someone please explain how to solve it ?? ​
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4 \times 2

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3 years ago
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The area of a rectangular wall of a barn is 85 square feet. Its length is 12 feet longer than the width. Find the length and wid
MaRussiya [10]

Answer:

Length = 17 feet, Width = 5 feet

Step-by-step explanation:

Given:

The area of a rectangular wall of a barn is 85 square feet.

Its length is 12 feet longer than the width.

Question asked:

Find the length and width of the wall of the barn.

Solution:

Let width of a rectangular wall of a barn = x

<u>As length is 12 feet longer than the width.</u>

Length of a rectangular wall of a barn = 12+x

As we know:

Area\ of\ rectangle=length\times breadth

85=(12+x)x\\\\85=12x+x^{2} \\

Subtracting both sides by 85

x^{2} +12x-85=0\\x^{2} +17x-5x-85=0\\Taking\ common\\x+(x+17)-5x(x+17)=0\\(x+17)(x-5)=0\\x+17=0, x-5=0\\x=-17,x=5

As width can never be in negative, hence  width of a rectangular wall of a barn = x = 5 feet

Length of a rectangular wall of a barn = 12+x=12+5=17\ feet

Therefore, length and width of the wall of the barn is 17 feet and 5 feet respectively.

                 

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