It’s the third one 9(5+1)
As 9 x 5 = 45
9x 1 = 9
Answer: 30°
Step by step explanation:
1) Supplementary angles add up to 180°
2) (2x+10)+(5x-40)=180
3) solve for x
4) x=30
Answer: 
Step-by-step explanation:
Let n= Number of packs John needs.
Tiles in 1 pack = 6
Tiles in <em>n</em> pack = <em>6n</em>
If he needs at least 100 tiles.
then
6n ≥ 100

The required inequality: 
Answer:
<h2>5s 4 X 2</h2>
Step-by-step explanation: