The correct answer is 8/7
Answer:
=3(x+8)(x+1)
Step-by-step explanation:
3(x^2+9x+8)
3(x^2+8x+1x+8)
3[(x^2+8x)+(1x+8)]
3[x(x+8)+1(x+8)]
=3(x+8)(x+1)
Answer:
Step-by-step explanation:
Let shall be considering the Cosine rule in this situation.
a^2 = b^2+c^2- 2bc.cosA
Where a = ?
b = 21km
c 45km
A = 131
a^2 = 21^2+45^2-2(21*45).cos131
a^2 = 441+2025-1890(-0.6560)
a^2 = 2466+1239.951
a^2 = 3705.951
a= 60.876km
Finding the bearing of the port from the ship.
We shall be considering the Sine rule
Sin A/a = Sin B/b
Where A = ?
a = 45km
B = 131°
b = 60.876km
Sin A/45 = sin131/60.876
SinA×60.876 = 45×sin131
SinA×60.876= 45×0.7547
SinA×60.876 = 33.961
SinA= 33.961/60.876
SinA = 0.5578
A = sin^-1 0.5578
A = 33.9°
15 because if you substitute -1 in for x then you have a double negative, that becomes positive and 2+1=3 and 3•5=15