80 POINTS Which properties justify the steps taken to solve the system?

{2a+7b=03a−5b=31

Drag the answers into the boxes to match each step.

10a+35b=0; 21a−35b=217
​31a = 217
a = 7
2(7)+7b=0
14 + 7b = 0
7b=−14
b=−2

The image of the point (-6, -2)under a translation is (−7,0). find the coordinates of the image of the point (7,0) under the same translation.

According to the number line, what is the distance between points a and b? v ++ + + + + -16 -14 -12 -10 -8 + 6 + 4 + -2 + 0 + 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 o6 units o 7 units 12 units o 14 units

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?