A(n)=4+4(n-1)
a(n)=4+4n-4
a(n)=4n
76=4n
n=19
The sum of any arithmetic sequence (series are infinite) is:
(a+a(n))(n/2)
The average of the first and last terms times the number of terms, in this case we found that n=19 so:
19(4+76)/2=760
Answer:
The correct option is;
5.89°
Step-by-step explanation:
The speed with which the plane flies = 350 mph
The direction of flight of the plane = N 40° E
The speed with which the wind blows = 40 mph
The direction in which the wind blows = S 70° E
Therefore, we have;
The resolution of the components of the motion of the plane, given as follows;
= 350 × sin(40°)·i + 350 × cos(40°)·j
The resolution of the components of the motion of the wind, given as follows;
= 40 × sin(70°)·i - 40 × cos(70°)·j
The resultant motion of the plane is given as follows;
= 262.563·i + 254.435·j
The direction of motion of the plane = tan⁻¹(262.563/254.435) ≈ N 45.9° E
Therefore, the plane's drift = Plane's Track - Plane's Heading = N 45.9° E - N 40° E ≈ 5.9° ≈ 5.89°
Therefore, the correct option is 5.89°.
Answer:
C
Step-by-step explanation:
A straight diagonal line going the middle of the graph is a proportianal relationship.
Hello!
We can put in numbers for x to get points of the graph
2(-4)^2 + 16(-4) + 30 = -2
One point is (-4, -2)
2(-3)^2 + 16(-3) + 30 = 0
The next point is (-3, 0)
2(-5)^2 + 16(-5) + 30 = 0
The third point is (-5, 0)
The parabola has a vertex of (-4, -2) and goes through the points (-3, 0) and (-5, 0)
Hope this helps!