Answer:
B = 70
Step-by-step explanation:
The sum of the angles of a triangle add to 180 degrees
A + B + C = 180
40 + 2x-30 + x+20 = 180
Combine like terms
3x + 30 = 180
Subtract 30 from each side
3x+30-30 = 180-30
3x = 150
Divide by 3
3x/3 =150/3
x = 50
We want to find angle B
B = 2x-30
=2(50) - 30
= 100 - 30
= 70
Answer:
Each friend should have 3 trading cards. hope this helps
Step-by-step explanation:
The two formulas i used should be in your book
Answer:
The radioactive isotope 14C has a half-life of approximately 5715 years. A piece of ancient charcoal contains only 75% as much of the radioac
Step-by-step explanation:
ece of modern charcoal. How long ago was the tree burned to make the ancient charcoal
Answer:
The sine function is:
![y(x)=\frac{2}{3}sin[3\pi (x-\frac{2\pi}{3})]-2](https://tex.z-dn.net/?f=y%28x%29%3D%5Cfrac%7B2%7D%7B3%7Dsin%5B3%5Cpi%20%28x-%5Cfrac%7B2%5Cpi%7D%7B3%7D%29%5D-2)
Step-by-step explanation:
We need to recall that a sine function can write as:
Where:
- A is the amplitude of the function
- B is the period
- C is the phase shift left
- D is the vertical shift
So we just need to use the listed attributes
Therefore, the sine function is:
![y(x)=\frac{2}{3}sin[3\pi (x-\frac{2\pi}{3})]-2](https://tex.z-dn.net/?f=y%28x%29%3D%5Cfrac%7B2%7D%7B3%7Dsin%5B3%5Cpi%20%28x-%5Cfrac%7B2%5Cpi%7D%7B3%7D%29%5D-2)
I hope it helps you!