Answer: ∠1 = 109° ∠2 = 71°
<u>Step-by-step explanation:</u>
If the two angles form a linear pair, then their sum is 180°
∠1 + ∠2 = 180°
(5x + 9) + (3x + 11) = 180
8x + 20 = 180
8x = 160
x = 20
∠1 = 5x + 9
= 5(20) + 9
= 100 + 9
= 109
∠2 = 3x + 11
= 3(20) + 11
= 60 + 11
= 71
<u> CHECK:</u>
∠1 + ∠2 = 180°
109° + 71° = 180°
180° = 180° 
Answer: your answer is 20.
Step-by-step explanation:
15 +4= 19 rounded to the nearest tenth is 20
Answer: i dont see anything to answer the question
Step-by-step explanation:
We use the Order of Operations here.
Parentheses
Exponents
Multiplying
Adding
Dividing
Subtracting (PEMDAS)
And if both are there, we work left to right.
In the process we multiply first, then add left to right..
So,
9 * 8 + 2 + 4
= 72 + 2 + 4
= 74 + 4
= 78.