(7x-9y)(7x-9y)

Fill in the blanks of the following: x/7=y/3=(3x+5y)/………=(7x-9y)/…….

If x:y=3:7, then find (7x+3y):(9x-3y)

For f(x ,y)= 7x +9y , what is the value of f(x,y) when y =((5)/(x))^(2) and x=3 ?

Fill in the blanks: x/7=y/3=(7x-9y)/(square)

If the ratio between 8 and 11 is the same as the ratio of 2x - y to x + 2y , find the value of (7x)/(9y) .

Simplify : (i) (5x - 9y) - (-7x + y) (ii) (x^(2) -x) -(1)/(2)(x - 3 + 3x^(2)) (iii) [7 - 2x + 5y - (x -y)]-(5x + 3y -7) (iv) ((1)/(3)y^(2) - (4)/(7)y + 5) - ((2)/(7)y - (2)/(3)y^(2) + 2) - ((1)/(7)y - 3 + 2y^(2))

If x:y=8:9, find the ratio (7x-4y):3x+2y

If x :\ y=8:9, find the ratio (7x-4y):3x+2ydot