Just add up the two functions
(f+g)(x)=(7x^3-2x-12)+(-3x^3-8x^2+10x)
(f+g)(x)=4x^3-8x^2+8x-12
unfortunately you choice isn't correct. it's the fourth choice
120*3=360. That's the answer.
Answer:
) A (3, 5)
(ii) B (-2, 7)
(iii) C (-5, -8)
(iv) D (9, -4)
Solution:
When rotated through 180° anticlockwise or clockwise about the origin, the new position of the above points is.
(i) The new position of the point A (3, 5) will be A' (-3, -5)
If I had to guess that it mean -4x + 6y = -18 and y = -2x+21:
Since we have a y =, we can plug that in.
-4x + 6(-2x + 21) = -18
-4x -12x + 126 = -18
-16x = -18 -126
-16x = -144
-16x/-16 = -144/-16
x = 9
