Answer:
<em>n = 20</em>
Step-by-step explanation:
[ 180° ( n - 2 ) ] / n = 162°
180 ( n - 2 ) = 162 n
180n - 360 = 162n
18n = 360
<em>n = 20</em>
Answer: (-3,-2)
Step-by-step explanation:
Answer:
∅ = 50°
Step-by-step explanation:
YOU NEED A CALCULATOR TO SOLVE THIS!
You need to use Law of Sines
![\frac{a}{sinA} =\frac{b}{sinB} = \frac{c}{sinC}](https://tex.z-dn.net/?f=%5Cfrac%7Ba%7D%7BsinA%7D%20%3D%5Cfrac%7Bb%7D%7BsinB%7D%20%3D%20%5Cfrac%7Bc%7D%7BsinC%7D)
Here you will be doing ![\frac{a}{sinA} =\frac{c}{sinC}](https://tex.z-dn.net/?f=%5Cfrac%7Ba%7D%7BsinA%7D%20%3D%5Cfrac%7Bc%7D%7BsinC%7D)
a and c are the lengths, while A and C are the angles
you want to get the denominators out from underneath so multiply both sides by sinA and sin43
![3.46sin43 = 2.54sinA](https://tex.z-dn.net/?f=3.46sin43%20%3D%202.54sinA)
Now you want to get sinA alone so divide both sides by 2.54
now get A alone
put that into the calculator
![49.61741033 = A](https://tex.z-dn.net/?f=49.61741033%20%3D%20A)
<span>You need to set up 2 equations for this, a system to be exact
let x represent the cheaper phone and y represent the upgraded phone
for store costs you will have
5x+25y=200
for selling prices you will have 30x+100y=900
set these two equations together
5x+25y=200
30x+100y=900
multiply the first one by -4 and add them
-20x-100y=-800
30x+100y=900
10x=100
x=10
10 cheaper phones, plug into any equation again
5(10)+25(y)=200
y=6<<<6 upgraded phones</span>