Can you please help me this is the elimination method

for number one its -x+10y=14x+10y=21 the next one is Simplifying

-7x + -5y = 11

Solving

-7x + -5y = 11

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '5y' to each side of the equation.

-7x + -5y + 5y = 11 + 5y

Combine like terms: -5y + 5y = 0

-7x + 0 = 11 + 5y

-7x = 11 + 5y

Divide each side by '-7'.

x = -1.571428571 + -0.7142857143y

Simplifying

x = -1.571428571 + -0.7142857143y

Step-by-step explanation:

these r for the first one

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.

that is the sum

step-by-step explanation:

there are no other answers without knowing the variables values