Here, as triangles are equal, their ratio would be equal.
8/x+4 = 12 /2x+1
8(2x+1) = 12(x+4)
16x+8 = 12x + 48
16x-12x = 48 - 8
4x = 40
x = 10
Hope this helps!
Answer:
β = arccos((a^2 + c^2 - b^2)/(2·a·c))
β = arccos((3^2 + 7^2 - 5^2)/(2·3·7)) = 38.21°
Answer:
change f(x) to 0 than 7*2x=14x
0=14x-28x+21
0=-14x+21
-21=-14x
x=3/2
