I’ll mark as brainliest!!

7/10

Step-by-step explanation:

0.7 = 7/10

You can't simply further so this is the final answer.

x = 7/9

Step-by-step explanation:

Let x = 0.7777

Multiply both sides by 10

10x  = 7.7777

  x   = 0.7777      {Subtract}

9x  = 7

 x = 7/9

a c

step-by-step explanation:

a) 0,0; 1,1; and 2,2

step-by-step explanation:

these have the exact same coordinates, thus they are the correct function.