Step-by-step explanation:
it seems there are some mistakes with this text.
if I understand correctly, than she runs on a circular track with a radius of 79 ft for 126 ft.
and we need to find the angle of the arc (the part-circle) she was running.
for that we need to find the ratio arc length / circle circumference, and then multiply that with 360° (you know, a full circle represents 360°, one full turn around), and that will be the arc angle.
the circle circumference is
2×pi×r = 2×pi×79 = 496.3716393... ft
the arc angle is therefore
360 × 126 / 496.3716393 = 91.38314201...°
rounded to the nearest degree : 91°
Answer:
Step-by-step explanation:
15 + c² = 96
c² = 96 - 15
c² = 81
c² = 9²
c = 9
Bug P has moved to +12 in 4 seconds, so is moving +3 units in each second.
.. x = 3t
Bug N has moved to -8 in 4 seconds, so is moving -2 units in each second.
.. y = -2t
_____
"per" means "divided by" (and vice versa), so -8 units per 4 seconds means
.. (-8 units)/(4 seconds) = -2 units/second . . . . . . . . reduce the fraction
When you multiply this fraction by a number of seconds, you cancel the "seconds" and the result is some number of units. For example,
.. (-2 units/second)*(4 second) = -8 units·second/second = -8 units
That is, speed multiplied by time gives distance.
In the equations above, we understand that the "3" means "3 units/second", and the "t" means "t seconds". Then when you multiply, the resulting x means "x units". The measures are usually left off and the equations are understood to give correct results when the variables have appropriate measures.
Step-by-step explanation:
169 = (13)²
169 is the square of 13.
Answer:
the answer is y=1x+(-1) or just 1x-1
Step-by-step explanation: