Angle between two vectors = arc cos [(u.v)/(abs(u) x abs (v))]
u.v = (10 x 9) + (6 x 5) = 90 + 30 = 120
abs (u) =

abs (v) =

Angle between the two vectors = arc cos [120 / (11.66 x 10.30)] = arc cos [120 / 120.1] = arc cos [1] = 0
Since the angle between the two vectors is 0,
therefore, the angles are parallel
56/25= $2.24 per gallon (Wow that's a lot)
32.05/15= $2.14 per gallon (Better....but not really)
It would be best to buy 15 gallons for $32.05
Answer:
2
x
+
9
y
−
2
Step-by-step explanation:
If you're just looking to simplify and/or combine like terms, here's your answer: 2
x
+
9
y
−
2
Glad I could help!!
This will go -7/2,-2.1, square root of 9, 3.5,last will be square root of 5