Answer:
y² = 9² + 19² - 2(9)(19)Cos (41°)
Step-by-step explanation:
Triangle X Y Z is shown.
The length of X Y is 9,
the length of Y Z is 19, and the length of X Z is y. Angle X Y Z is 41 degrees.
Law of cosines is given as:a²= b² + c² – 2bccos(A)
Applying this to Triangle XYZ, and since we are Solving for y
y² = x² + z² - 2xzCos Y
The length of X Y = x is 9,
the length of Y Z = y is 19
y²= 9² + 19² - 2(9 × 19)Cos (41°)
= y² = 9² + 19² - 2(9)(19)Cos (41°)
Option d is correct
Answer:
60
Step-by-step explanation:
9/15 = 0.6
0.6 x 100 = 60
Answer:
A
Step-by-step explanation:
give me da 20 pointssss
Answer:
The answer to your question is:
x = 3
y = 6
z = - 1
Step-by-step explanation:
- x - y - z = - 8 (I)
- 4x + 4y + 5z = 7 (II)
2x + 2z = 4 (III)
2z = 4 - 2x
z = 2 - x (IIIA)
Substitute IIIA in I
- x - y - (2 - x) = - 8 - x - y - 2 + x = -8 - y - 2 = -8 - y = -8 + 2 y = 6
Substitute IIIA and y in II
- 4x + 4(6) + 5(2 - x) = 7
-4x + 24 + 10 - 5x = 7
-9x = 7 -34
-9x = -27
x = 3
Substitute x in IIIA
z = 2 - 3
z = - 1
