2n+9+5n=30 combine like terms on left side
7n+9=30 subtract 9 from both sides
7n=21 divide both sides by 7
n=3
Answer:
A)
Step-by-step explanation:
The equation of a circle is where is the center and is the radius. If and , then:
Therefore, the equation of the circle is
Answer:
The answer is 15.
Step-by-step explanation:
3 Times 5 equals 15.
Answer:
4
Step-by-step explanation:
The triangle itself
Also the 3 at the top
They are the only ones with 3 sides
Answer:
70
Step-by-step explanation:
20x(1+150%)
28x(1+1.5)
28x2.5
70