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VladimirAG [237]
3 years ago
15

Out of 30 questions, Ahmad answer 12 of them incorrectly. What percent of the questions did he answer correctly?

Mathematics
1 answer:
kati45 [8]3 years ago
7 0
First, you would need to determine how many questions he got correct. 
30 - 12 = 18

Next, you would need to create an equation for this problem. Let x represent the unknown percentage. 
\frac{18}{30} = \frac{x}{100}

Now, you would cross multiply. 
30x = 1,800

The last step would be to isolate the x. To do this, you would divide both sides of the equal sign by 30. 
x = 60

Ahmad got 60% of the questions correct. 

I hope this helps!
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Step-by-step explanation:

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3 years ago
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Determine whether the sequence converges or diverges. If it converges, find the limit. (If an answer does not exist, enter DNE.)
In-s [12.5K]

Answer:

The sequence diverges.

Step-by-step explanation:

A sequence a_{n} converges when \lim_{n \rightarrow \infty} a_{n} is a real number.

In this question, the sequence given is:

a_{n} = 4n\cos{(7n\pi)}

The cosine is always going to be between -1 and 1, so for the convergence of the sequence, we look it as: a_{n} = 4n. So

\lim_{n \rightarrow \infty} a_{n} = \lim_{n \rightarrow \infty} 4n = \infty

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5 0
3 years ago
In the standard (x,y) coordinate plane, what is the slope of the line 4x+7y=9?​
o-na [289]

Answer: -4/7

Step-by-step explanation:

To find the slope, let's change the equation to slope-intercept form.

4x+7y=9              [subtract both sides by 4x]

7y=-4x+9           [divide both sides by 7]

y=-\frac{4}{7}x+\frac{9}{7}

Now, we know the slope is -4/7.

5 0
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Slope intercept form
Bess [88]
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4 0
3 years ago
4/9 / 9/5= the answer is
mr Goodwill [35]

Answer:

  20/81

Step-by-step explanation:

Without parentheses, it is hard to tell what you are dividing. We assume you want ...

  (4/9)/(9/5)

Then ...

\displaystyle\frac{\left(\frac{4}{9}\right)}{\left(\frac{9}{5}\right)}=\frac{4}{9}\cdot\frac{5}{9}=\frac{4\cdot 5}{9\cdot 9}=\frac{20}{81}

_____

As written (without parentheses), your expression is evaluated left to right, so evaluates to ...

  4/(9·9·5) = 4/405

7 0
3 years ago
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