Establish the identities: (a^2 + b^2) (c^2 + d^2) = (ac plusminus bd)^2 + (ad minusplus bc)^2 and use them to express 481 = (13)(37) as the sum of two squares in two different ways.

7x+8y=-18, 4x-9y=-3 solve the system of equations

Restrictions on f(x) = 1/x+5 and g(x) = x-2

Δabc is dilated by a scale factor of 3 with the origin as the center of dilation to form δa′b′c′. the slope of is -1.2. the length of is p units, the length of is q units, and the length of is r units. the slope of is . the length of is units.