Are the ratios 18/27 and 20/50 equivalent? yes or no?
plz i need answer! 19 points for !

If 20% of a number is 35, what is 50% of that number?

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8