Answer:
x=4 y=0
Step-by-step explanation:
3x+5y=12
-(x-3y=4)
3x+5y=12
3(-x+3y=-4)
3x+5y=12
-3x+9y=-12
14y=0
y=0
Then, substitute the y into the equation to find x
x-3(0)=4
x=4
Answer:
Step-by-step explanation:
Use trigonometry
<u>The ratio of the adjacent side of a right triangle to the hypotenuse is called the cosine:</u>
- cos x = 18/25 = 0.72
- cos x = 0.72
- x = arccos 0.72
- x = 43.9455° ≈ 44.0° rounded
3x-12 = 12x
-12 = 9x
-12/9 = x
x= -4/3
It is B.
If you put “sin 30” in your calculator you should get 1/2, aka .5