Answer:
multiplying equation 2 by 2 and adding eq 1
3x-2y = 17
+4x+2y = 60 3
=
7x = 77
x = 77/7 = 11
then
y = (60-4x)/2 {from equation 3}
y = 60-44/2 = 16/2 = 8
then
<em><u>x</u></em><em><u> </u></em><em><u>=</u></em><em><u> </u></em><em><u>1</u></em><em><u>1</u></em>
<em><u>y</u></em><em><u> </u></em><em><u>=</u></em><em><u> </u></em><em><u>8</u></em>
<em><u>hope</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u> </u></em>
Answer:
Step-by-step explanation:
sinθ = 7/30
θ = arcsin(7/30) ≈ 13.49°
Answer:
b
Step-by-step explanation:
i just did that
The maximum and minimum percent of students who write their notes with a pencil are 22% and 25%, respectively
<h3>Survey</h3>
The survey results given as:
--- the proportion of students reported that they wrote their notes with a pencil
![Accuracy = 3\%](https://tex.z-dn.net/?f=Accuracy%20%3D%203%5C%25)
<h3>Range</h3>
The range is then calculated as:
![Range = Pencil \pm Accuracy](https://tex.z-dn.net/?f=Range%20%3D%20Pencil%20%5Cpm%20Accuracy)
<h3>Minimum</h3>
So, we have:
![Minimum = Pencil - Accuracy](https://tex.z-dn.net/?f=Minimum%20%3D%20Pencil%20-%20Accuracy)
This gives
![Minimum = 25\% - 3\%](https://tex.z-dn.net/?f=Minimum%20%3D%2025%5C%25%20-%203%5C%25)
![Minimum = 22\%](https://tex.z-dn.net/?f=Minimum%20%3D%2022%5C%25)
<h3>Maximum</h3>
Also, we have:
![Maximum = Pencil + Accuracy](https://tex.z-dn.net/?f=Maximum%20%3D%20Pencil%20%2B%20Accuracy)
This gives
![Maximum = 25\%+ 3\%](https://tex.z-dn.net/?f=Maximum%20%3D%2025%5C%25%2B%203%5C%25)
![Maximum = 28\%](https://tex.z-dn.net/?f=Maximum%20%3D%2028%5C%25)
Hence, the maximum and minimum percent of students who write their notes with a pencil are 22% and 25%, respectively
Read more about range at:
brainly.com/question/17025675