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Lemur [1.5K]
2 years ago
10

if five times a number added to 4 is divided by the number plus 6 the result is nine halves, Find The Number

Mathematics
1 answer:
Leto [7]2 years ago
7 0

Answer:

8/13

Step-by-step explanation:

Let the number be x

if five times a number added to 4 is divided by the number plus 6 the result is nine halves

  • five times the number = 5x
  • five times a number added to 4 = 5x+4
  • five times a number added to 4 is divided by the number = (5x+4)/x
  • five times a number added to 4 is divided by the number plus 6 = (5x+4)/x  + 6
  • nive halves = 9*(1/2)

five times a number added to 4 is divided by the number plus 6 the result is nine halves

(5x+4)/x  + 6 = 9(1/2)

=>(5x+4)/x  + 6 -6 = 9(1/2) -6 = 9/2-6 = (9-6*2)/2 = -3/2

=>(5x+4)= -3/2 *x= -3x/2

=>2(5x+4) = -3x

=> 10x +8 = -3x

=> 10x+3x = 8

=> 13x = 8

=> x = 8/13

Thus, the number is 8/13

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-4/5 to the power of 2 times -3/50
Crazy boy [7]
=(-4/5)^2 * -3/50
square -4/5 first; remember -4/5^2 is the same as -4/5 * -4/5

=(-4/5 * -4/5) * -3/50
multiply -4 numerators; multiply 5 denominators

=(-4 * -4)/(5 * 5) * -3/50

=16/25 * -3/50
multiply numerators 16 & -3; multiply denominators 25 & 50

=(16 * -3)/(25 * 50)
= -48/1250

simplify by 2
= -24/625 (or -0.0384)


ANSWER: -24/625 (or -0.0384)

Hope this helps! :)
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