Answer:
x = -6
Step-by-step explanation:
-11 - 8x = -3x + 19 (Move constants to right side)
-8x = -3x + 19 + 11 (Move x to left side)
3x - 8x = 30 (simplify)
-5x = 30 (divide both sides by -5)
x = -6
Answer:
3 inches
Step-by-step explanation:
4 miles = 1 in
12 miles = 3 inches
Multiply both side of equation by 3.
Okay, so you find the area of the full circle, 81pi and then 120 is 1/3 of the circle so you divide 81pi by 3 and get 27pi.
Area of a circle is directly proportional to the square of radius of the circle while the circumference is proportional to the radius of the circle. This means that if the radius of a circle is increased x times, then its area will be increased to x^2 times the original area, and the circumference will increase to x times the original circumference.
Thus when the radius is doubled, or in other words if radius mad 2 time the original radius, the area of circle will become 2^2 = 4 time the original area. The circumference will become 2 times the original circumference.
We can calculate exact area and circumference of a circle from its radius using the following equations:
Area of circle = (pi/4)*r^2
Circumference of circle = 2*pi*r
Where r is the radius of the circle.
I know this is a lot, sorry.
