Answer:
2/3 or 66%
Step-by-step explanation:
there are 3 odd numbers on a 6 sided die
3 + 1 = 4
4/6 = 2/3
2 hours at 45 mph gives a distance of 90 miles
he has another 90 miles to travel
total distance=rate*(total time)
his average speed must be 60 mph
180=60*(2+t) where t is the amount of time he has to travel the other 90 miles
180=120+60t
180-120=60t
60=60t
t=60/60
t=1 hour
Sam must travel 90 miles in 1 hour, thus Sam must travel 90 miles per hour to have an average of 60 mph
90 mph is the answer
you can check by using the harmonic mean if you understand what it is:
(2*45*90)/(45+90)=8100/135=60
you can also find the answer using the harmonic mean:
(2*45*R)/(45+R)=60
(2*45*R)=60*(45+R)
90R=2700+60R
90R-60R=2700
30R=2700
R=2700/30
R=90 mph must be Sam's speed for the other 90 miles to average 60 mph
solve this problem as a graph
Answer:
10 units
Does the answer help you?
Answer:
A. the perpendicular bisector of the line segment XY
Step-by-step explanation:
You know that one point equidistant from X and Y is the midpoint of segment XY. The third vertex of an isosceles triangle with XY as its base will also be equidistant from X and Y. That vertex will be located on the perpendicular bisector of XY.
The locus of points of interest is the perpendicular bisector of XY.
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For many geometry problems, it can be helpful to draw a diagram.