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Ainat [17]
3 years ago
8

You earned a 84% on a science test. You answered 21 questions correctly. How many questions were on the test?

Mathematics
1 answer:
sergij07 [2.7K]3 years ago
6 0
20 x .80 = 16 
So the answer would be 16. 
I hope this helps :)
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365x + 125 = 250x + 175
maxonik [38]
First, set up the equation. 
365x + 125 = 250x + 175 

Second, combine like terms on the same side by subtracting 250x and 125 from both sides.

365x +125 = 250x + 175  
-250x  -125   -250x -125 
__________________
115x = 50

Third, divide both sides by 115 to solve for x.

115x = 50
----      ----
115     115 

Fourth, simplify. 

x=50/115=10/23 or 0.435

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ioda
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