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docker41 [41]
2 years ago
10

a woman spent two thirds of her money. she lost two thirds of the remiander and then had $4(aus money) left. how much money did

she start with?
Mathematics
1 answer:
antiseptic1488 [7]2 years ago
8 0

Step-by-step explanation:

2/3 lost is 1/3 kept

2/3 of the 1/3 kept is 2/9 lost

1/3 x - 2/9 x = 4

3/9 x - 2/9 x = 4

1/9 x = 4

x = 36

First she lost 2/3 of 36, which is 24. She had 12 left. Then she lost 2/3 of 12 which is 8. She had 4 left.

You might be interested in
Y varies directly as x if y is 2 when x is 8 then the constant of variation is 1/4
sp2606 [1]

Answer:

a. True.

Step-by-step explanation:

y = kx

y = 2 when x = 8 gives:

2 = 8 * k

k = 2/8 = 1/4.

6 0
2 years ago
one number is 4 more than another number. if 4 times the smaller number is decreased by twice the larger number. the result is 1
soldier1979 [14.2K]

x and x+4 are the numbers

3x=2(x+4)

3x=2x+8

3x-2x=8

x=8

x+4=12


3 0
3 years ago
2x+8y = 6<br> 15x + 20y = 15
Likurg_2 [28]

Answer:

The solution is (0, 3/4)

Step-by-step explanation:

Please copy and share the instructions.  Here they are:  Solve the following system of linear equations.

Both of the equations can be reduced (simplified):

2x+8y = 6            =>  x + 4y = 3

15x + 20y = 15     => 3x + 4y = 3

Let's use the elimination by addition and subtraction method.  Multiply the first equation by -1, obtaining

                                 -x - 4y = -3

Add the second       3x + 4y = 3

equation to the

first.

We get:                       2x = 0.

Thus, x = 0.  Substituting 0 for x in the 1st original equation yields:

2(0) + 8y = 6.  Then y = 6/8, or y = 3/4.

The solution is (0, 3/4).

4 0
3 years ago
The height of a tree in feet, y, is modeled by the equation y = 2.5x + 3, where x represents
kogti [31]

Answer:

85.5 feet tall

Step-by-step explanation:

2.5(33)+3

82.5+3

85.5

7 0
3 years ago
Help Me! Please!!!!!!!!!!!!!!!!!!!
natulia [17]
A)
Let c be the number of right guesses.
the probability of c answers =.25 and probability of the wrong answer is 1-.25=.75
c distribution is in the parameter of (20, .25).
b) mean = 20 * .25== 5
c) p of c guess =.25 ^20 =9.095* 10 ^-13
d) p of 10 c guess =.014 or 1.4% it is not possible for him to have 10 right guess.


4 0
3 years ago
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