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dybincka [34]
3 years ago
10

Solve the system of equations by ELIMINATION.

Mathematics
1 answer:
Dafna1 [17]3 years ago
6 0

Step-by-step explanation:

4x + 2y = 10 --------(1)

2x + 3y = 33 -----------(2)

Multiply 2 with eq. (1) and 4 with eq. (2)

8x + 4y = 20 ____________(3)

8x + 12y = 132 ______(4)

Subtracting (3) from (4),

8x + 4y = 20

- 8x -12y = -132

----------------------

0 -8y = -112

y = 112/8

y = 4 is the answer.

Putting the vakue of y in eq. (2),

2x + 12 = 33

2x = 33-12

2x = 21

x = 21/2 is the answer.

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-4r - 2r + 5 = ? combining like terms with negative coefficients
jarptica [38.1K]

Answer:

-6r + 5

Step-by-step explanation:

-4r - 2r + 5

= (-4 -2)r + 5

= -6r + 5

4 0
4 years ago
0 1 3 6 10 what goes after 10?
bija089 [108]

Answer:

15

Step-by-step explanation:

0 + 1 = 1

1 + 2 = 3

3 + 3 = 6

6 + 4 = 10

10 + 5 = 15

6 0
2 years ago
Read 2 more answers
The amount dispensed by a soft-drink dispensing machine has a normal distribution with mean μ and standard deviation 0.191 ounce
nirvana33 [79]

Answer:

The value of mean is  \mu = 15.64

Step-by-step explanation:

The normal distribution of the soft-drink dispensing machine can be stated statistically like

                   X ~ N (\mu ,0.191^2)

The standard form representation is

           P(X

     Now we need to obtain \mu in such a way that

                   P(X>16) = 0.01

   In standard form

       Since

                 P(Z>16 -\frac{\mu}{0.191} ) = 0.03

   This means

              P(Z

Now looking at the z-table for probability of 0.99 we obtain 1.88

    i.e

            16 - \frac{\mu}{0.191} = 1.88

Making \mu\ the \ subject

        16 - \mu = 1.88 *0.191

       \mu = 16 -(1.88*0.191)

          =15.64

   

8 0
3 years ago
Explain I don’t understand
Serggg [28]
So just divide 100 by 25 which equals 4 then divide 120 by 30 which also equals to 4 and if the rest equal 4 then its proportional (1)
And then same for 2 and 3 just divided the bottom by the top and if they all get the same answer they are proportion and if one is not the same then it’s not

For the grids if the dots are line diagonally straight and it starts at the 0 then it’s proportional if not then it’s not

Hope this helps :)
7 0
3 years ago
Alsooo need help as well !!!
sergey [27]
With more years of education, the annual salary should also increase

when someone is more educated, they are usually able to perform more difficult jobs and in turn get paid more money
8 0
3 years ago
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