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Elenna [48]
3 years ago
9

Could u help me make sure its the right answer i can't get this wrong .

Mathematics
2 answers:
Delicious77 [7]3 years ago
7 0

Answer:

Step-by-step explanation:

Next time just substitute each of the options for x and y one at a time.

A

Black_prince [1.1K]3 years ago
5 0

Answer:

12x + 6y = 102

5x - 6y = 34

17x = 136

x = 8

y = 1

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Use Cramer's Rule to find x in the system of equations below.
Ronch [10]

Answer: x = 4 , y = -3

Step-by-step explanation:

Going by the Cramer's rule , we first determine the determinant by dealing with only  the coefficients of x and y in the 2 x 2 matrix.

2x  -  3y = 17

5x  + 4y = 8

2        -3

5         4,   going by the rule now, we now have

(2 x 4) - (5 x -3)

8 + 15

= 23.

Now to find the value of x , replace the constants with the coefficient of x and divide by he determinants.

 17        -3

 8          4

---------------  

2           -3

5            4

( 17 x 4 ) - ( 8 x -3 )

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

         23

     =  68 + 24

         ------------

              23

    =       92/23

    =           4.

 x =   4

Now  to find y, just repeat the process by replacing the coefficient of y with the constants.

2        17

5        8

-----------

2        -3

5         4

( 2 x 8 ) - ( 5 x 17 )

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

            23

       16 - 85

       ---------

          23

  =  -69/23

  =   -3

y =  -3.

check

substitute for the values in any of the equations above.

2(4)  - 3(-3)

8  + 9

= 17

 

 

8 0
3 years ago
Gabriella and her children went into a restaurant where they sell hotdogs for $4 each and tacos for $2 each. Gabriella has $30 t
Lorico [155]

A possible solution to the inequality is 2 hotdogs and 8 tacos.

Let x represents the number of hotdogs purchased and y represents the number of tacos purchased.

Gabriella has $30 to spend and must buy a minimum of 9 hotdogs and tacos altogether.

Hence:

4x + 2y ≤ 30    (1)

x + y ≥ 9      (2)

Also:

x ≥ 2   (3)

A possible solution to the inequality is 2 hotdogs and 8 tacos.

Find out more on inequality at: brainly.com/question/241541

6 0
2 years ago
What is the range of possible sizes for side x?
Sonja [21]

Answer:

The answer is 0.5

hope this help :)

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
1. Scientists randomly select ten groups from a population of men over 50 years old. They calculate the mean
Naya [18.7K]

Answer:

Step-by-step explanation:

Sampling Variability

Hope that helped! :)

5 0
3 years ago
8 + 3 + 2a = -1 + 3a + 4
otez555 [7]

Answer:

a = 8

Step-by-step explanation:

8 + 3 + 1 - 4 = 3a - 2a

8 = a

a = 8

I hope this helps a little bit.

3 0
2 years ago
Read 2 more answers
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