Answer:
![-\frac{6}{4}](https://tex.z-dn.net/?f=-%5Cfrac%7B6%7D%7B4%7D)
Step-by-step explanation:
The first 2 numbers cancel, and -15/4+9/4 is the same as 9/4 - 15/4
Please mark me as brainliest if I am correct
Answer:
Compositions of transformations are not commutative. You have to do the transformations in the proper order to obtain the same image and doing it in a non-commutative order will give you a different image.
Answer:
3 packages
Step-by-step explanation:
Given
See attachment for complete question
Required
The packages less than 30 kg.
To do this, we simply add up the frequencies of packages less than 30 kg.
From the chart, we have:
![x \to Frequency](https://tex.z-dn.net/?f=x%20%5Cto%20Frequency)
![0 - 9 \to 0.55](https://tex.z-dn.net/?f=0%20-%209%20%5Cto%200.55)
![10 - 19 \to 0.55](https://tex.z-dn.net/?f=10%20-%2019%20%5Cto%200.55)
![20 - 29 \to 1.90](https://tex.z-dn.net/?f=20%20-%2029%20%5Cto%201.90)
So, the total is:
![Total = 0.55 + 0.55 + 1.90](https://tex.z-dn.net/?f=Total%20%3D%200.55%20%2B%200.55%20%2B%201.90)
![Total = 3](https://tex.z-dn.net/?f=Total%20%3D%203)
Answer:
It's A I'm pretty sureeeeeee I have to type alot cause then I can't submit but ya A:)
Answer:
The value of cos Ф is ± ![\frac{1}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D)
Step-by-step explanation:
There are important rules for sin Ф and cos Ф
∵ sin Ф = ![\frac{\sqrt{3}}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Csqrt%7B3%7D%7D%7B2%7D)
∴ sin²Ф = ![(\frac{\sqrt{3}}{2})^{2}](https://tex.z-dn.net/?f=%28%5Cfrac%7B%5Csqrt%7B3%7D%7D%7B2%7D%29%5E%7B2%7D)
∴ sin²Ф = ![\frac{3}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B3%7D%7B4%7D)
→ By using the third rule above
∵ cos²Ф = 1 - sin²Ф
∴ cos²Ф = 1 - ![\frac{3}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B3%7D%7B4%7D)
∴ cos²Ф = ![\frac{1}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B4%7D)
→ Take square root for both sides
∴ cos Ф = ± ![\frac{1}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D)
∴ The value of cos Ф is ± ![\frac{1}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D)