Answer:
5
Step-by-step explanation:
0.5x=6-3.5
0.5x=2.5
x=2.5÷0.5
x=5
I’m not sure if your asking for the solution, but Hope this helps!
Answer:
209.96
Step-by-step explanation:
we know that the circumference of the circle is equal to
C = 
we have

substitute would be

assume that 
64
Answer: R = (4, 5)
Step-by-step explanation: Midpoint is simply the center of a line. So, the equation for it is ((x1+x2)/2, (y1+y2)/2). Hence for this,
x coordinate- (6+x)/2=5
x=4
y coordinates- (9+y)/2=7
y=5
And therefore R is (4, 5)
45 divided by 3= 15 then 15 times 4 =60 mph