Trên tập hợp A={-2,-1,1,2,3,4,5} ta xét quan hệ hai ngôi R như sau: xRy <=> x+ 3y chẵn
a: chứng minh R là quan hệ tương đương
b:tìm các lớp tương đương [1], [2], [4]

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4

answer: it is a.,b.,d.

step-by-step explanation: