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Vikki [24]
3 years ago
9

Select the step in the solution that shows the first error.

Mathematics
1 answer:
siniylev [52]3 years ago
8 0

Answer:

Step 2: 20x = 80 + 10x

Step-by-step explanation:

Step 1: 20x - 10 = 80 + 10x

Add 10 to each side

20x - 10+10 = 80+10 + 10x

20x  = 90 + 10x

Step 2: 20x = 80 + 10x   This has the first error

Step 3: 10x = 80

Step 4: x= 8

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Please help! Correct answer only please! I need to finish this assignment by today.
stira [4]

Answer:

B

Step-by-step explanation:

If the ratio of the length of the chalkboard to the width is 4:3, this means that the length of this one is 7* 4/3=28/3. This can be rewritten as approximately 9.33 inches, or answer choice B. Hope this helps!

6 0
3 years ago
HELP PLEASE!!!
nikdorinn [45]

Answer:

Option A

Step-by-step explanation:

R = (\frac{V_f-Vi}{V_i} )100

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6 0
3 years ago
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Lemur [1.5K]
1.
The rate at which Leonard bought was 2 packs per x dollars, 

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2.

with 1 $ Leonard buys 2/x packs
then
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5 0
3 years ago
Trigonometric question, 30 points, will give brainliest.
zheka24 [161]

hmmm first off let's convert the √3 +i to trigonometric form, and then use De Moivre's root theorem, bearing in mind that √3 and i or 1i are both positive, meaning we're on the I Quadrant.

\bf (\stackrel{a}{\sqrt{3}}~,~\stackrel{b}{1i})\qquad \begin{cases} r=&\sqrt{(\sqrt{3})^2+1^2}\\ &\sqrt{3+1}\\ &2\\ \theta =&tan^{-1}\left( \frac{1}{\sqrt{3}}\right)\\\\ &tan^{-1}\left( \frac{\sqrt{3}}{3} \right)\\ &\frac{\pi }{6} \end{cases}~\hfill \implies ~\hfill 2\left[ cos\left( \frac{\pi }{6}\right) +i~sin\left( \frac{\pi }{6}\right) \right]

\bf ~\dotfill\\\\ \qquad \textit{power of two complex numbers} \\\\\ [\quad r[cos(\theta)+isin(\theta)]\quad ]^n\implies r^n[cos(n\cdot \theta)+isin(n\cdot \theta)] \\\\[-0.35em] ~\dotfill

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3 0
4 years ago
Can someone please give me the (Answers) to this? ... please ...<br><br> I need help….
salantis [7]

Answer:

Step-by-step explanation:

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4. 45/x = x/81

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6 0
2 years ago
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