True
work: f(3)=2(3)-9
f(3)=6-9
f(3)=-3
Answer:
12
Step-by-step explanation:
AC = AB + BC
Since we know what each variable equals, we can write out the equation as shown:
52 = 8X + 8 + 2X + 4
Combining like terms:
52 = 10X + 12
Subtract 12 from both sides:
40 = 10X
Divide by 10:
X = 4
Now that we know X, we can figure out BC
BC = 2(4) + 4
BC = 8 + 4
BC = 12
Therefore BC is 12.
Area of a circle is multiplying pi with the radius raised to the 2nd power.
A = π r²
Diameter = 8
Radius = 8/2 = 4
A = 3.14 x 4²
A = 3.14 X 16
A = 50.24
