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Brilliant_brown [7]
4 years ago
15

Eighteen and nine tenths is 2.6 less than a number. find the number.

Mathematics
1 answer:
arlik [135]4 years ago
5 0
18(9/10) + 2.6 = 18.8
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David inherited some money from his uncle. He invested half of the money with Bernie
ValentinkaMS [17]
Given:
Let x be the whole amount inherited.
1/2 * x - invested with Bernie Madoff
1/3 * x - lost due to identity theft
1/8 * x - lost in casino
40,000 - remainder

x - x/2 - x/3 - x/8 = 40,000

LCM: 
2: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24
3: 3, 6, 9, 12, 15, 18, 21, 24
8: 8, 16, 24, 

   x * 24/24 = 24x / 24
x/2 * 12/12 = 12x / 24
x/3 *   8/8   = 8x / 24
x/8 *   3/3   = 3x / 24
40,000 * 24/24 = 960,000 / 24

24x/24 - 12x/24 - 8x/24 - 3x/24 = 960,000/24
(24x - 12x - 8x - 3x)/24 = 960,000/24
x/24 = 960,000/24
24 * x/24 = 24 * 960,000/24
x = 960,000

x = 960,000 initial inheritance
x/2 = 960,000/2 = 480,000 invested with Bernie Madoff
x/3 = 960,000/3 = 320,000 lost due to identity theft
x/8 = 960,000/8 = 120,000 lost in the casino
40,000 - remaining amount.

960k - 480k - 320k - 120k = 40k
40k = 40k
 
3 0
3 years ago
Use elimination to solve<br><br> 3y-6x=7-4y-3x=9
Masja [62]
Reorder both sides

3y-6x=9
7-4y-3x=9

Multiply both sides
-6x-3y=9
6x+8y=-4

Dived both sides

11y= 5

Y=5/11

Substitute the value of Y

-3x-4(5/11)

Equals —> -14/11

Answer : (5/11 , -14/11)
5 0
3 years ago
PLzzzzzzz helppppppppp!!!
fomenos
5. y = -3 x - 8

6. y = - 1/2 x + 1
7 0
3 years ago
If the legs of an isosceles right triangle have a length of ft, the hypotenuse will have a length of?
lesya [120]
Isoceleese means then that 2 sides are equal
right triangle so the legs are equal

a^2+b^2=c^2
the legs aer a and b
in isocoleese, a=b
a^2+a^2=c^2
2a^2=c^2
if isocoleese=a then c=?
solve for c
sqrt both sides
a√2=c


if the legs are x feet, then the hyppotonuse is x√2 feet
6 0
3 years ago
PLEASE HELP!!!!!!!!
Vlad [161]

Answer: C is the answer

Step-by-step explanation:

7 0
3 years ago
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