Answer:
Step-by-step explanation:
Cos θ =<u> u*v </u>
IuI *IvI
u * v = 7*(-1) + (-2)*2
= -7 - 4
= -11
IuI = 
= 
= 
I vI = 
= 
= 
Cos θ = 
= 
Cos θ = -0.68
θ = 132.5°
The question is the thing that needs help. What does that hanging "a leading 2" mean? And rational real coefficients? Obviously if they're rational they're gonna be real, but really.
I would say "a leading 2" means the highest power of x has a coefficient to two, which is none of the above.
The last two are of degree two, which is the lowest degree. They both have integer coefficients, so are necessarily real and rational as well.
Neither has a leading 2 as far as I can tell. The last one is monic (a leading coefficient of 1). I like monic polynomials so I'd pick that one, but that doesn't make it right.
None of the above
Left: 1-2 and the right: 34-68
Answer:
1/(√x-5)*(√x+5)/(√x+5)
Step-by-step explanation:
1/(√x-5)*(√x+5)/(√x+5)
Answer:
x=1
Step-by-step explanation:
5x+2=3x+4(2x-1)
First take the ( ) 4*2xand 4*-1
Then simplify and add all like terms
then subtract/add(opposite of what it is) whichever x term from both sides
then subtract/add the numbers on the side you chose to the other side to get something as the following
x=#
then divide x by the #
