6j-k=23
3k+6j=11
solve j and k using the elimination method on the simultaneous equations

Step-by-step explanation:

6j - k = 23

6j + 3k = 11multiply by -1

6j - k = 23

-6j - 3k = -11 (result of multiplying by -1)

-4k = 12

k = -12/4

k = - 3 <

6j - k = 23

6j - (-3) = 23

6j + 3 = 23

6j = 23 - 3

6j = 20

j = 20/6

j = 10/3 <===

solution is : j = 10/3 and k = -3

15%

step-by-step explanation:

use the table and count the number of guesses that has two correct answers.

the following are two correct answers

10010, 01100, 11000

a total of 3 numbers having 2 correct guesses out of 20 questions.

probability of getting 2 correct guesses = the number of questions getting 2 correct answers / total number of questions.

= 3/20

to convert it into percent multiply by 100, we get

= 3/20 * 100

= 15%

the answer is 15%

you.

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