Answer:
final displacement = - 3cm +5cm = + 2 cm
ie 2 cm towards right
The wall and ground make a 90 degree angle. You don't need the 13 feet at all and that is the hypotenuse it uses the wall and ground distances so its tangent because tangent is the only trigonometric function that doesn't use the hypotenuse.
Find the LCM (Lowest common factor) of both numbers.
So, 1.2 x 4 = 4.8
1.6 x 3 = 4.8
We now have the same amount of ground beef for each cost. So for 1.2 lb of beef we do, 4.55 x 4 = 18.2 (£18.20)
And then 6.30 x 3 = 18.9 (£18.90)
So, 1.2 lb package of ground beef is the better buy.
Apply the distribute property twice to get 3a+1/3b-2a-b. Then simplify like terms to get a-2/3b.