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kogti [31]
3 years ago
12

18. The sum of 10 times a number and fifteen is added to eleven times the same number.​

Mathematics
1 answer:
sergij07 [2.7K]3 years ago
4 0

Answer:

Sum of 10 times a number and fifteen is added to eleven times the same number is therefore: 10x + 15 + 11x = 21x + 15

Step-by-step explanation:

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Step-by-step explanation:

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Ivanshal [37]

Answer:

x = 2 and x = -2

Step-by-step explanation:

The easiest way is to guess. We know that you can't have a square root of a negative number. This constrains x between negative infinity to 2. Testing 2 and -2, we see that it satisfy the equation.

The more systematic approach is shown below

\sqrt{5-2x}-\sqrt{2-x}=1 \\\sqrt{5-2x}-\sqrt{2-x}+\sqrt{2-x}=1+\sqrt{2-x} \\\sqrt{5-2x} = 1+\sqrt{2-x}

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x= -2, 2

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2 years ago
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Step-by-step explanation:

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2 years ago
Find m P. Quadrilateral
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Answer:

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Step-by-step explanation:

Since two sides are parallel this is a trapezoid

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(7x + 31) + (21x - 19) = 180

combine like terms

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Subtract 12 from both sides

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Divide both sidees by 28

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m∠P = 21(6) - 19

m∠P = 107º

8 0
3 years ago
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