Answer:
the cords are 4 -2
Step-by-step explanation:
Use dot product
a=(x1,y1) and b=(x2,y2)
a.b=/a/*/b/ cos x
a.b mean dot product of two vectors
a.b is equals x1*y1+x2*y2
Answer:
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Answer:
120
Step-by-step explanation:
we know if the arc measures 120, we know that its 1/3 of the circle, so ABC will also be 120
Answer:
r = -1/2
Step-by-step explanation:
3(5 + 4r) = -18r
15 +12r = -18r by distributive property
15 = -12r - 18r
15 = -30r
r = - 1/2r
