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vichka [17]
4 years ago
14

Ms. Medina asked the class to solve the equation 2(x+4)=18.

Mathematics
2 answers:
7nadin3 [17]4 years ago
4 0

Answer:

PEMDAS parentheses exponents multiplication divide add subtract....

rewona [7]4 years ago
3 0

Answer:

The distributive property

Step-by-step explanation:

He distributed 2 * x and 2 * 4 to get 2x +8

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Answer:

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Step-by-step explanation:

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3 years ago
In △ACD, if AC≅AD, m∠A = 3x − 4, m∠C = 5x + 1, and m∠D = 7x − 27, find x and the measure of each angle.
ivanzaharov [21]

Answer: x= 14

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8 0
3 years ago
HI decomposes into its elements according to second-order kinetics. What concentration of HI remains from an initial concentrati
Novosadov [1.4K]

Answer:

Therefore (2.30-0.03747)= 2.2625 M of HI remains from an initial concentration of 2.30 M after 4.5 hours.

Step-by-step explanation:

second order reaction: The rate of reaction  proportional to the square of the concentration of reactant.

For second order reaction

k=\frac{x}{ta(a-x)}

K is rate constant = 1.6×10⁻³M⁻¹hr⁻¹

a = initial concentration of reactant = 2.30 M

a-x = concentration of reactant after t h

t = time = 4.5 h

Putting the values in the above equation,

1.6\times 10^{-3}= \frac{x}{4.5 \times 2.30 \times (2.30-x)}

\Rightarrow 16.56 \times 10^{-3}\times (2.30-x)= x

\Rightarrow 16.56 \times 10^{-3}\times 2.30-16.56 \times 10^{-3}\times x= x

\Rightarrow (1+16.56 \times 10^{-3}) x=16.56 \times 10^{-3}\times 2.30

\Rightarrow x = 0.03747

Therefore (2.30-0.03747)= 2.2625 M of HI remains from an initial concentration of 2.30 M after 4.5 hours.

4 0
4 years ago
X= 90, y=47 x=43, y= 47
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