270° CW is the same as 90° CCW. The mapping for that is (x, y) ⇒ (-y, x).
D(1, 2) ⇒ D'(-2, 1)
F(2, 3) ⇒ F'(-3, 2)
G(4, 1) ⇒ G'(-1, 4)
Answer: 3x - 9
Step-by-step explanation: "9 less than three times a number" does not mean 9 minus three times a number, less than actually switches the order around so that 9 less than three times a number actually means three times a number minus 1 which can be read as 3x - 9.
Answer: l = P/2 - w
Step-by-step explanation:
Perimeter formula for rectangle :
P = 2( l + w )
We have to write l in terms of P and W.
P/2 = ( l + w)
P/2 - w = l
Now, flip the equation and you'll get :
l = P/2 - w