Answer:
Probably play video games and drink hot chocolate. Maybe go sledding to.
Step-by-step explanation:
Smaller circle:
diameter = 9 ft
radius = diameter/2 = (9 ft)/2 = 4.5 ft
A = pi(r^2) = 3.14159 * (4.5 ft)^2 = 63.62 ft^2
Larger circle:
diameter = 20 ft
radius = diameter/2 = (20 ft)/2 = 10 ft
A = pi(r^2) = 3.14159 * (10 ft)^2 = 314.159 ft^2
Difference = larger are - smaller area
Difference = 314.16 ft^2 - 63.62 ft^2 = 250.54 ft^2
Answer: About 251 ft^2
Answer:
See below
Step-by-step explanation:
-a times -1
Negative times a negative equals a positive
a times 1 = a
Answer:
Both a = −4 and a = −1 are true solutions
Step-by-step explanation:
Given
Required
The true statement about the solutions
We have:
Square both sides
Collect like terms
Expand
Factorize
Factor out a + 4
Split:
Solve:
For 12:
Since the line y = mx + c is a tangent, then the distance from the centre of the circle to the line is equal to the radius.
Using perpendicular distance:
Squaring both sides, we get:
, as required.