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vovangra [49]
4 years ago
6

Help me with my math hw please

Mathematics
1 answer:
devlian [24]4 years ago
4 0
94.5 divided by 4.5 equals 21. Therefore, it takes him 1 hour to complete 21 kilometers. 
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8 0
3 years ago
(a) 7.5% of what number is 7.38?<br> (b) what percent of 12.5 is 39
eduard
a)  The answer is:  98.4 . 
___________________________ 
     7.5% of 98.4 is 7.38 .
___________________________
Explanation:
___________________________

7.5% * x = 7.38?  Solve for "x".

7.5% = 7.5÷100 = 0.075 .

(0.075)x = 7.38  ; Solve for "x" ;

Divide EACH SIDE of the equation by "(0.075)";

(0.075)x/ (0.075) = (7.38) / (0.075) ;

to get:  x = 98.4 .

The answer is:  98.4 .

  7.5% of 98.4 is 7.38.
_________________________________________
b)  The answer is:  312% .

312% of 12.5 is 39 .
__________________________________ 

What percent of 12.5 is 39 ?

(n/100) * 12.5 = 39 ?

n/100 = 39 ÷ 12.5 = 3.12 .

n/100 = 3.12 .

n = 3.12 * 100 = 312.
____________________
The answer is:  312% .
____________________
312% of 12.5 is 39 .
____________________

7 0
3 years ago
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