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3 years ago

(50 POINTS) Subtract. (−8.3x+4)−(3.2x−5)

Mathematics

1 answer:

shusha [124]3 years ago

7 0

Answer:

<h2>Hello!!!</h2>

Step-by-step explanation:

The first step for solving this expression is to remove the first set of parenthesis.

-8.3x+4 - (3.2x-5)

Remember that when there is a "_" sign in front of the parenthesis, we must change the sign of the expression to the following

-8.3x + 4 - 3.2x + 5

Collect the like terms with an x variable.

-11.5x + 4 + 5

Lastly, add the number to get your final answer

-11.5x + 9

Hope that helps you dear...

Have a nice day..

Buhbye!

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A test has 20 questions. How many do you need to answer correctly in order to get 4/5 of them right?

vova2212 [387]

The answer is: " 16 " .
____________________________
Explanation:
____________________________
Method 1)
____________________________
(4/5) *(20/1) = ?

The "5" cancels to a "1" ; and the "20" cancels to a "4" ;
(since "20÷5=4" ; and "5÷5=1") ;
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Rewrite as: (4/1) * (4/1) = 4 * 4 = 16.
_________________________________
Method 2)
_______________________________
4/5 * 20/1 = (4*20)/(5*1) = (80/5) = 16 .
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Method 3)
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4/5 * 20 = ? ;

4/5 = 8/10 = 0.8 ;

0.8 * 20 = 16.0 = 16.
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