9(5)^2 - 2 - (5)
9(25) - 2 - 5
225 - 2 - 5
223 - 5
218
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Answer:
y= -5
Step-by-step explanation:
-3(4) +9y = 57
-12 + 9y = 57
-12 + 12 + 9y = 57 + 12
9y/9 = -45
y= -5
Answer:
140
Step-by-step explanation:
Since m∠2 is 40°, then the m∠1 is also 40°. With that, ∠1 and ∠5 are supplementary, so we have 180 - 40 = 140°
The polar coordinates are given by M(x, y), such tha x=rcos(teta), and y=rsin(teta), it was given M(5,5), so 5=rcos(teta) and 5=rsin(teta), the ratio gives us 5/5= cotan (teta), 1= cotan (teta), implies 1= tan(teta), so teta = Pi/4, let's find r
5=rsin(Pi/4)=r . sqrt(2)/2, so r =10/sqrt(2)=10sqrt(2)
finally the polar coordinates are (r, teta) = (10sqrt(2), Pi/4)
