Answer:
x = 16
Step-by-step explanation:
Verticle angles are always congruent, so:
(8x + 15) = 143
Now, we can solve to isolate x:
8x + 15 - 15 = 143 - 15 (subtract 15 from both sides)
8x/8 = 128/8 (divide both sides by 8)
x = 16
You can always plug in the value of x to the original equation to check your answer:
8(16) + 15 = 143
We know that In right angle triangle c^2 = a^2 + b^2.
19^2 = 3^2 + b^2
b = (361 - 9)^1/2 = 18.761663039294
Now for angles
sin(A) = a/c = 3/19
A = sin{-1}(3/19) = 9.0847202873911
A = 9.0847202873911
sin(B) = b/c = 18.761663039294 / 19
B = sin{-1}(18.761663039294 / 19) = 80.915279712614
B = 80.915279712614
The answer is B
sin=Opposite/Hypotenuse
sin=28/100
Divide numerator and denominator by 4
sin=7/25
Cosine=adjacent/hypotenuse
cos=96/100
Divide numerator and denominator by 4
cos=24/25
Tangent=opposite/adjacent
tan=28/96
Divide numerator and denominator by 4
tan=7/24
That's is depend from the author of the equation. But most time there is need to multiply value X into constant before.
In other words it look likes
y=2*x-3
Answer:
49.12 square units
Step-by-step explanation:
Area of triangle = 

Circle:
d = 8 units
r = 8/2 = 4 units


Area of the figure = area of triangle +area of semicircle
= 24 + 25.12
= 49.12 sq. units