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Rasek [7]
3 years ago
12

31% of 40 estimate what is it please help​

Mathematics
2 answers:
chubhunter [2.5K]3 years ago
7 0

31% of 40 is 12.4 exactly

Vadim26 [7]3 years ago
6 0

This indication of how well your heart is pumping out blood can help to ... A ejection fraction measurement under 40 percent may be evidence of heart failure or cardiomyopathy

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Which expressions are equivelent to 3 1/4 - (-5/8)
sertanlavr [38]

Answer:

<em>Fraction form=31/8 Decimal form=3.875 </em>

Step-by-step explanation:

<em>Convert the mixed numbers to improper fractions, then find the Least common denominator and combine</em>  

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Which fraction is greater 9/12 or 1/3
ValentinkaMS [17]
We need to first find a common denominator. This means that we need the 12 and the 3 to be the same number. We can change the 1/3 into 4/12 and see that 9/12 is larger than 4/12.
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What geographical information was used in alloying the first three digits of social security numbers to the state
Gala2k [10]
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5 0
3 years ago
Use the distributive property to expand the expression. −2(5a − 3b2) − 4b + 3 A) −10a + 6b2 − 4b + 3 B) −10a − 6b2 − 4b + 3 C) −
Nikolay [14]
The answer is:  [B]:  " -10a + 6b² − 4b + 3 " .
_____________________________________
Explanation:
____________________
Given:
____________________________
  -2(5a − 3b²) − 4b + 3 ;  
_________________________________
    "Use the distributive property [of multiplication] to expand the expression."
______________________________________________
Note the distributive property of multiplication:
______________________________________________
           a(b + c) = ab + ac ;
           a(b − c) = ab − ac ;
______________________________________________
So, we have:  " -2(5a − 3b²) − 4b + 3 "  ;
______________________________________________

Start  with:  " -2(5a − 3b²) " ; 
______________________________________________ 
 
   -2(5a − 3b²)  =  (-2*5a) − (-2*3b²)  =  (-10a) − (-6b²)
 
           =  -10a + 6b²
________________________________________________
        → Now, bring down the rest of the problem; 
________________________________________________
  -10a + 6b² − 4b + 3 ;  which is:  Answer choice:  [B].
________________________________________________
8 0
4 years ago
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