Marla made an error when solving the equation shown. What was her error ,and how should she fix it?

1 answer:

8 0

In Step 1, she used the Distributive Property incorrectly. She should have distributed the 3 to the 2. The equation should have been

3x + 6 + 1 = 24.

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How to solve for the x

navik [9.2K]

I think its 15\52 im guessing

8 0

4 years ago

(-2,2) ; 6x + 3y = -9

Ket [755]

So, in this equation you're just plugging in I'm pretty sure. So x is -2 which is pretty self explanatory.. & y is 2. If you plug them in like so, your answer will turn out to be -6.

6(-2)+3(2)=-6
-12+6=-6

The answer should be -6 not -9.. so that was most likely a typo I'm pretty sure because the answer would not be correct as -9.

6 0

3 years ago

The mass of a dust particle is approximately

trasher [3.6K]

Answer:

Given:

$\textsf{Mass of a dust particle} = \sf 7.5 \times 10^{-10}$

$\textsf{Mass of an electron} = \sf 9.1 \times 10^{-31}$

To calculate how many electrons have the same mass as one dust particle, divide the mass of a dust particle by the mass of an electron:

$\begin{aligned}\implies \dfrac{\textsf{Mass of a dust particle}}{\textsf{Mass of an electron}} & = \sf \dfrac{7.5 \times 10^{-10}}{9.1 \times 10^{-31}}\\\\& = \sf \dfrac{7.5}{9.1} \times \dfrac{10^{-10}}{10^{-31}}\\\\& = \sf 0.8241... \times 10^{(-10-(-31))}\\\\& = \sf 0.8241... \times 10^{21}\\\\& = \sf 8.2 \times 10^{20}\end{aligned}$