What’s equivalent to -6 + 2x ?

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?

Plot a point at the y-intercept of the following function on the provided graph. 3y=-5x+7 20 points

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 : /