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KonstantinChe [14]

3 years ago

12

Look at the student work shown below. Simplify: 4(2s - 7). (44(2 s) – 7 8st - 7 Did the student correctly simplify the expressio

n? If the student did wrong and what should have been done

1 answer:

Darina [25.2K]3 years ago

7 0

Answer:

hvjfvfd

Step-by-step explanation:

bfjdzv

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In 2 hours, 305 cans at a factory can be filled. At that

svet-max [94.6K]

Answer:

The answer is 915

Step-by-step explanation:

Because if you add 305 three times you get the correct answer

hope this helps

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Devon is making 8 loaves of bread. Each loaf of bread needs

kondor19780726 [428]

Answer:

30 cups of flour

Step-by-step explanation:

3 x 8 = 24

3/4 x 8 = 24/4 = 6

24 + 6 = 30

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2 years ago

Please help with these math questions I really need it ! Don't just do it for points pls

steposvetlana [31]

Answer:

wouldn't that be 81 but i dont know

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2 years ago

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Solve the equation 2cosA = 3tanA

zavuch27 [327]

$\bf sin^2(\theta)+cos^2(\theta)=1\implies cos^2(\theta)=1-sin^2(\theta)
\\\\\\
tan(\theta)=\cfrac{sin(\theta)}{cos(\theta)}\\\\
-----------------------------\\\\

2cos(A)=3tan(A)\implies 2cos(A)=3\cfrac{sin(A)}{cos(A)}
\\\\\\
2cos^2(A)=3sin(A)\implies 2[1-sin^2(A)]=3sin(A)
\\\\\\
2-2sin^2(A)=3sin(A)\implies 2sin^2(A)+3sin(A)-2$

$\bf \\\\\\
0=[2sin(A)-1][sin(A)+2]\implies 
\begin{cases}
0=2sin(A)-1\\
1=2sin(A)\\
\frac{1}{2}=sin(A)\\\\
sin^{-1}\left( \frac{1}{2} \right)=\measuredangle A\\\\
\frac{\pi }{6},\frac{5\pi }{6}\\
----------\\
0=sin(A)+2\\
-2=sin(A)
\end{cases}$

now, as far as the second case....well, sine of anything is within the range of -1 or 1, so -1 < sin(A) < 1

now, we have -2 = sin(A), which simply is out of range for a valid sine, so there's no angle with such sine

so, only the first case are the valid angles for A

8 0

3 years ago

a box contains three pens two markers, and one highlighter. Tera selects one item randomly and does not return it to the box, th

Anna [14]

Answer:

For the pen 3/6 and for the marker 2/6

Step-by-step explanation:

Hope this helps

6 0

3 years ago