Answer:
130.54°
Step-by-step explanation:
The formula for law of cosines is c^2= a^2+ b^2 -2ab cos(C),
a,b, and c are the sides of the triangle. C is the angle opposite to the side c.
To solve this problem add the given values into the formula, and solve for C.
10^2=5^2+ 6^2- 2(5)(6) cos(C)
100=25+36 - 2(5)(6) cos(C)
100=25+36 -60 cos(C)
100=61 -60 cos(C)
39= -60 cos(C)
cos^-1 (-39/60)= C
130.54°=C
Step-by-step explanation:
-3x=-6
X=2
2y=12
Y=6
6x(-3)=-18
Answer:
Option b.
Step-by-step explanation:
step 1
Find the slope
The formula to calculate the slope between two points is equal to
we have the points
(7,2) and (-1,0)
substitute the given values in the formula
simplify
step 2
Find the equation of the line in point slope form
we have
substitute
Multiply by 4 both sides
Step-by-step explanation:
-3(-x -3y) = 3( x +3y) = 3x+9y
Answer:
B.
Step-by-step explanation:
The answer is B because 3/5 of 1/2 is less than 1/2. The equation that represents this problem is
3/5 x 1/2 = 3/10
3/10 < 1/2
Therefore, 3/5 is less than 1/2!