Two triangles are similar. the sides of one triangle are 4,8, and 10. if the shortest side of the triangle is 12, find the length of the missing sides

Amanda went into the grocery business starting with five stores. after one year, she opened two more stores. after two years, she opened two more stores than the previous year. if amanda expands her grocery business following the same pattern, which of the following graphs represents the number of stores she will own over time?

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /

What is the rate for one gallon of gasoline