X=2
subtract 7 from both sides
Answer:
I don't know but if you figure it out tell me. Thanks
Step-by-step explanation:
Answer:
c) 12/15 = 4/5
Step-by-step explanation:
imagine we mirror the triangle up, so that Z is on top.
then you can clearly see that 6 is cos(X) times r (and r is then 7.5).
XY is sin(X)×7.5
and again, 7.5 is r (the line making the X angle).
so, the cosine ratio of X is
6 = cos(X)×7.5
cos(X) = 6/7.5 or then 12/15. or simplified 4/5.
A) probability of she not drawing a yellow beads or green beads is probability of she drawing red or white. Red+ white = 30. There are total of 100 beads. That means that asked probability is:
30/100
b) its oposite that result from a) yellow beads + green beads = 70
probability is: 70/100
Answer:
![cos(R) = \frac{\sqrt{15}}{5}](https://tex.z-dn.net/?f=%20cos%28R%29%20%3D%20%5Cfrac%7B%5Csqrt%7B15%7D%7D%7B5%7D%20)
Step-by-step explanation:
To find the cosine of <R, apply the following trigonometric ratio formula:
![cos(R) = \frac{adjacent}{hypotenuse}](https://tex.z-dn.net/?f=%20cos%28R%29%20%3D%20%5Cfrac%7Badjacent%7D%7Bhypotenuse%7D%20)
Adjacent = 3
Hypotenuse = √15
Plug in the values into the formula
![cos(R) = \frac{3}{\sqrt{15}}](https://tex.z-dn.net/?f=%20cos%28R%29%20%3D%20%5Cfrac%7B3%7D%7B%5Csqrt%7B15%7D%7D%20)
Multiply the numerator and denominator by √15 to rationalize.
![cos(R) = \frac{3 \times \sqrt{15}}{\sqrt{15} \times \sqrt{15}}](https://tex.z-dn.net/?f=%20cos%28R%29%20%3D%20%5Cfrac%7B3%20%5Ctimes%20%5Csqrt%7B15%7D%7D%7B%5Csqrt%7B15%7D%20%5Ctimes%20%5Csqrt%7B15%7D%7D%20)
![cos(R) = \frac{3\sqrt{15}}{(\sqrt{15})^2}](https://tex.z-dn.net/?f=%20cos%28R%29%20%3D%20%5Cfrac%7B3%5Csqrt%7B15%7D%7D%7B%28%5Csqrt%7B15%7D%29%5E2%7D%20)
![cos(R) = \frac{3\sqrt{15}}{15}](https://tex.z-dn.net/?f=%20cos%28R%29%20%3D%20%5Cfrac%7B3%5Csqrt%7B15%7D%7D%7B15%7D%20)
![cos(R) = \frac{\sqrt{15}}{5}](https://tex.z-dn.net/?f=%20cos%28R%29%20%3D%20%5Cfrac%7B%5Csqrt%7B15%7D%7D%7B5%7D%20)