I hope this helps you
-2.4g-2.1=-8g-2
-8g-2=-8g-2
0=0
*Y=(-3/4)x+2* The slope is NEGATIVE (important), then just rise over run. Rise is 4. Run is 3 (4/3), the y intercept is 2 so just add it to the slope
5(9)+4 because they are just substituting
1/4 is 0.25 in decimal form and 25/99 is 0.252525 (repeating) in decimal form. they are alike because they are both .25, but different because the decimal form of 25/99 repeats.