You have -4,-3,-2, that is a 3 out of a total of 21 points or numbers on the number line. 3/21 is reduces to 1/7.
3 goes into 21 , 7 times. That is why it reduces to 1/7.
X=9 this is the answer for question 19
Answer: Distributive property
Step-by-step explanation: I do believe in questions like this you would distribute from the perenthisis (right?)