Answer:
2
Step-by-step explanation:
When a circle is colored it means the point is included in a graph but when a circle is not colored the point is not included. So, for x value 5 the y value is 2.
Answer:
difference means subtraction operation.
let the number be n :

arrange the equation:

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further more [ getting value of n ]
add 7 on all sides:

divide all sides by 5:

Answer:
70° and 20°
let the other 2 angles be 7x and 2x
90+7x+2x=180
9x=180-90
x=90/9
x=10
7x=7x10
70
2x=2×10
2p
Answer:
a piston chamber in a steam or internal combustion engine.