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LuckyWell [14K]
3 years ago
11

Find the linear equation of the statement "The difference of thirty and twelve times a number is equal to y."

Mathematics
1 answer:
Sladkaya [172]3 years ago
6 0

Answer 30-12x=y

Step-by-step explanation:

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Please show all steps thank you
madreJ [45]
I know I'm definitely wrong: 540. it looks like a right angle. 
I did on the calculator:
18 * 90 = 1620
1620 / 3 = 540
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For what value of x is the rational expression below undefined?
Blizzard [7]

Answer: The expression is undefined for x=4 and x=5.

The expression is undefined for any x that makes the denominator 0. This leads to solving a quadratic equation:

\frac{x+3}{x^2-9x+20}\\x^2-9x+20\neq 0\\x_{1,2}\neq\frac{9\pm\sqrt{9^2-80}}{2}=\frac{9\pm1}{2}\\x_1\neq4\\x_2\neq5

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The mass of 5 m' of copper is 44 800 kg. Work out<br> the density of copper.
solniwko [45]
Here bro this should help

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3 years ago
Che sum of two numbers is 2. If one number is subtracted from the other, their difference is - 8. Find the numbeRs
goldfiish [28.3K]
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7 0
2 years ago
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According to Boyle’s law, PV= K, what was the volume at the time of the first measurement given the following information? Round
Temka [501]
<h2>Hello!</h2>

The answer is:

The first measurement of volume is equal to 835.23 mL.

<h2>Why?</h2>

Boyle's Law equation can be used when the temperature is kept constant, and it establishes a relation between the pressure and volume, showing that when an ideal gas is kept constant, the pressure and volume are inversely proportional.

So, we Boyle's Law equation states that:

P_{1}V_{1}=P_{2}V_{2}

Where,

P_1=FirstPressure\\V_1=FirstVolume\\P_2=NewPressure\\V_2=NewVolume

Now, if we are looking for the first volume measurement, we need to rewrite the equation as follow:

P_{1}V_{1}=P_{2}V_{2}\\\\V_{1}=\frac{P_{2}V_{2}}{P_{1}}

So, substituting the given information and calculating, we have:

V_{1}=\frac{8.59atm*527mL}{5.42atm}

V_{1}=\frac{4526.93atm.mL}{5.42atm}=835.23mL

Hence, the first measurement of volume is equal 835.23 mL.

Have a nice day!

8 0
3 years ago
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