3x - 4y = -5
y = 4x - 2
is (1,2) a solution of the system?

Replace x with the given x value in the solution to see if it equals the Y value given in the solution:

3x - 4y = -5

3(1) - 4(2) =

3 - 8 = -5

True.

y = 4x-2

y = 4(1) - 2

y = 4-2

y = 2

True.

Yes (1,2) is a solution.

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.

a. is correct