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shutvik [7]
3 years ago
14

Which one is a solution to the system of equations? x + 3y = 18 x + 2y = 14

Mathematics
2 answers:
Arturiano [62]3 years ago
5 0
<span>x + 3y = 18
x + 2y = 14
------------------subtract
y = 4

</span>x + 3y = 18
x + 3(4) = 18
x + 12 = 18
x = 6

answer: solution (6,4)
Lostsunrise [7]3 years ago
5 0
The solution to your equation is (6,4)
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3 years ago
Butyric acid ( c3h7cooh) is a weak acid . what is the ph of a 0.0250 m solution of this acid. ka = 1.5 x 10-5 (2 decimal places)
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The pH of the weak acid is 3.21

Butyric acid is known as a weak acid, we need the concentration of [H+] formula of weak acid which is given by this equation :

[H^{+}]=\sqrt{Ka . Ma}

where [H+] is the concentration of ion H+, Ka is the weak acid ionization constant, and Ma is the acid concentration.

Since we know the concentration of H+, the pH can be calculated by using

pH = -log[H+]

From question above, we know that :

Ma = 0.0250M

Ka = 1.5 x 10¯⁵

By using the equation, we can determine the concentration of [H+]

[H+] = √(Ka . Ma)

[H+] = √(1.5 x 10¯⁵ . 0.0250)

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Substituting the value of [H+] to get the pH

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1 year ago
An art studio charges a start-up fee to cover art supplies, plus an additional fee per class. The graph shows the total cost for
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✅In the context of this situation, the rate of change can be interpreted to be the additional fee per class. Thus, an additional fee per class cost $15.

✔️Initial value is the same as the y-intercept.

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