The work of a student to solve a set of equations is shown below:

equation 1: m = 6 + n
equation 2: 2m = 8 + 8n

step 1: −2(m) = −2(6 + n)
2m = 8 + 8n

step 2: −2m = −12 − 2n
2m = 8 + 8n

step 3: −12 − 2n = 8 + 8n

step 4: −20 = 10n

step 5: n = −2

in which step did the student first make an error?
step 2
step 3
step 4
step 5

Which ordered pair (c, d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

Asystem of equations has 1 solution. if 4x-y=5 is one of the equations , which could be the other equation ?

Which of the following are independent events? a) knowing that it is going to rain tomorrow, and bringing an umbrella to schoolb) knowing that you have to get up early tomorrow, and going to bed before 9 p. mc) knowing that it is going to rain tomorrow, and going to bed before 9 p. md) knowing that you have a test in school tomorrow, and studying thw night before