Answer: ∠DOB: 48°
Step-by-step explanation:
1. we need an equation first. the sum of all angles (108°, n°, 2n°) is equal to 180°. we can depict this with the equation: 108°+2n°+n°=180°
2. now we can solve for the missing variable, n.
108°+3n°=180° → subtract both sides by → 3n°=72° → divide both sides by 3 → n=24°
3. now that we know that n=24°, we can solve the value of ∠DOB. we can see that ∠DOB is 2n° which we just plug the number we got for n into the equation. 2*24=48° meaning ∠DOB is 48°
hope this heped! ♡
Decreaseing means where it is going down
those blank points mean not including
brackets mean inlclude, it's like the ≤ or ≥ sign
parenthasees means not include, it's like the < or > sign
it is going down from -8 to -5, not including -5 so [-8,-5)
also going down from 4 to 8, not including 8, so [4,8)
the union is including both
[-8,-5) U [4,8) is answer for where the function is decreasing
There isn't a picture to help you with.
They are identical lines so they have infinity pairs
First box
<em>4/10</em>
0.4 divided by 1
0.4/1 *10
= 4/10
Box on top that's the point where it's 3 away from 4/10
<em>0.7</em>
Bottom
<em>7/10</em>
<em />
0.7 divided by 1
0.7/1*10
= 7/10
Next box
<em>0.9</em>
9/10
= 0.9
