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Archy [21]
3 years ago
13

Does anyone know this ?

Mathematics
2 answers:
vodomira [7]3 years ago
5 0

Answer:

Always

Step-by-step explanation:

If the irrational parts of the numbers have zero sum, the sum is rational. If not, the sum is irrational. It is true, for example, for 2 7, 3. It is false, for example, for3+2 5,−2 5 .

Kryger [21]3 years ago
4 0

Answer:

always

Step-by-step explanation:

Rational numbers can be expressed as a fraction of two integers. So, adding two rationals is the same as adding two such fractions.

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A window washer cleaned 38 windows in 2 hours. At this rate, how many windows did he clean in 7 hours?
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Answer:

Step-by-step explanation:

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Angelina_Jolie [31]

Step 1: Simplify both sides of the equation.

  • 65x²+390x+585=6x

Step 2: Subtract 6x from both sides.

  • 65x²+390x+585−6x=6x−6x
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For this equation: a=65, b=384, c=585

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Step 3: Use quadratic formula with a=65, b=384, c=585

  • x=−b±√b2−4ac/2a
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Therefore, There are no real solutions.

6 0
2 years ago
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Aleks [24]

Answer: A and c

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Step-by-step explanation:

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