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Fittoniya [83]
2 years ago
13

5x +6y = 20 (1)

Mathematics
2 answers:
Andrej [43]2 years ago
7 0

Answer:

c) x = -2; y = 5

Step-by-step explanation:

    4x - 3y = - 23   multiply by 2

    8x - 6y = - 46  

+   <u>5x + 6y = 20 </u>   add the two equations

   13x + 0y = -26  divide by 13

               x = -2     enter x into either original equation

 5(-2) + 6y = 20

    -10 + 6y = 20

             6y = 30

               y = 5

slega [8]2 years ago
4 0
(2) + (2)

=> 8x - 6y = -46 ———(3)

(1) + (3)

=> 5x + 6y + (8x - 6y) = 20 - 46

=> 13x + (6-6)y = -26

=> 13x + 0y = -26

=> 13x = -26

=> x = -26/13

=> x = -2

=> 5(-2) + 6y = 20

=> 6y = 20 + 10

=> 6y = 30

=> y = 5

x = -2, y = 5 => C





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there are 25 students in Hansels class and 17 of the students went on the class trip to the zoo. what percentage of students wen
drek231 [11]
It is given in the problem that out of 25 students in Hansels class 17 students went to the class trip to the zoo. From the above information it is easy to find the percentage of students that went for the class trip to the zoo.
Total number of students in the class = 25
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Then
Percentage of students that went to the zoo = (17/25) * 100
                                                                       = (17 * 4) percent
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6 0
3 years ago
What is 100/7 divided by 4 1/3 simplified if you answer thank you and happy holidays
SVETLANKA909090 [29]

Answer: 300/91

Step-by-step explanation:

1. Convert 4 1/3 to an improper fraction

13/3

2. Divide, using the keep, change, flip method to divide fractions

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- Change the division sign to a multiplication sign

- Flip the second fraction (13/3 -> 3/13)

3. Plug-in and evaluate

100/7 * 3/13

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If you are looking for the solution as a mixed number, it is 3 27/91

4. Simplify, if applicable. This fraction cannot be simplified any further.

7 0
3 years ago
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agasfer [191]
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3 years ago
B. Monica's young son has two jigsaw puzzles.
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Answer:

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