If a/b=c/d is true, they are a proporion
if a/b=c/d, then ad=bc is also true
if 9/5=10/18 is true then
9*18=10*5 should be true
162=50
false
easier way
just simplify them
9/5 is simplified already
10/18=5/9
9/5=5/9
no
they do not
Hello :
v . w = <span>| | v | | × </span><span>| | w | | cos(</span><span>θ) ....(1)
v(2,0,1) w(0,1,-3)
</span>v . w = (2)(0)+(0)(1)+(1)(-3) = - 3
| | v | | = √((2)²+(0)²+(1)²) = <span>√5
</span>| | w | = √((0)²+(1)²+(-3)²) = √10
by (1) :
cos(θ) = (v . w ) / | | v | | × | | w | |
cos(θ) = = - 3/√50
θ =..... calculate by 2ind function ( calculator)
Y=-2 should be the answer
Answer:
A.
Step-by-step explanation:
This equation has no solution.
Answer:
75
Step-by-step explanation: