I need help with this math question!!

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Find the y-intercept and x-intercept for the equation 5x-3y=60 what is the y-intercept

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick