Which of the following is equal to 5/7-4/7 (a) 0 (b) 1 (c) undefined (d) 1/7

Write a real-world solution that can be represented by the equation y = 7x be sure to explain what the variables represented in the solution

What is the area of the triangle 10 13 12

Why can't my rank go i have 1723 points, but my rank is only at ambitious, which is only 250 points! like, (p. s. i know this isn't related to math, but i just don't know why it's doing this and i would really appreciate if someone could tell me whats going on with this)