<span>{4x + y = 2
{−2x + y = 5
--------------------subtract
6x = -3
x = -1/2
</span>4x + y = 2
4(-1/2) + y = 2
-2 + y = 2
y = 4
x = -1/2 and y = 4
answer
<span>(−1/2, 4)</span>
First Question
circumference = pi * diameter
diameter = circumference/pi = 94.2 in./3.14 = 30 in.
The wheels have a 30-inch diameter.
-----------------------------------------------------------------------
Second question
The area of a circle: area = pi * r^2
radius = diameter/2 = 94.2 in./2 = 47.1 in.
area = pi * r^2 = 3.14 * 47.1 in. * 47.1 in. = 6966 in.^2
Answer: 6966 in.^2
-----------------------------------------------------------------------
Third question
The piece of felt has a width equal to the diameter of the wheel. The length has to be the same as 4 diameters.
4 * 94.2 in. = 376.8 in.
Answer: 376.8 in.
Answer:
25.85
Step-by-step explanation:
The area of a circle is given by A = π * r²
We have the value of the area, so we clear r:
r² = A / π
r² = 2100 / π = 668.45
r = √668.45 = 25.85
On Thursday is when DEF did better than it's average . Why? Because they were on time 10 flights and only delayed 1 flight .
