-5
2xy substitute 3 for y and 5 for x 2(5)(3) = 30
That equals 2xy + 3y which factors to y(2x + 3)
y=x/7 y=(1/7) x It is a direct variation since it is of the form y=kx, where k=1/7 , a constant
When an equation is in the form y = mx + b, it is known as slope-y-intercept form. Here, m is the slope and b is the y intercept. So, the slope in the equation y = -2x + 7 is -2.
15
2xy substitute 3 for y and 5 for x 2(5)(3) = 30
2xy=2*30*2=120
x2 + y2 = x2 - 2xy + y2 + 2xy = (x - y)2 + 2xy = 72 + 2*8 = 49 + 16 = 65 You could, instead, solve the two equations for x and y and substitute, but the above method is simpler.
No, it equals -2xy. lrn2math
2xy x is 2 y is 7 therefore (2)(2)(7) = 28
Because 2x+y is addition not multiplication
Y=15/(2c+2x)
2xy*9 if x=3 and y = 2 2(3)(2)*9 12*9 108 You substitute x and y for their equivalent (3 and 2) then simply multiply 2*x*y, then multiply the answer of that by 9.
To simplify the expression (8x^2y + 2xy^2), you can factor out the common terms. The greatest common factor is (2xy), so the expression can be rewritten as (2xy(4x + y)). Thus, the simplified form is (2xy(4x + y)).
2x(y - 3) + 7(y - 3) = (2x + 7)(y - 3)
y = x + 7
Assuming y' is dy/dx, y = x^4/4 + yx^2