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Diano4ka-milaya [45]
3 years ago
5

Plesee help me im so confused

Mathematics
2 answers:
ikadub [295]3 years ago
8 0
D. because that is the description of an octagon
Tom [10]3 years ago
4 0
"Octo..." always means 8 of something ('octopus'), and if you're talking about polygons, then "regular" means that all sides have the same length and all angles have the same measure.
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A log raft is moving downstream at a speed of 3 km/h. To insure that there are no river jams a supervisor travels along the raft
skad [1K]

Answer:

2000 meters

Step-by-step explanation:

When the motorboat is moving downstream, its speed relative to the ground is 18 km/h, so its speed relative to the raft is 15 km/h.

When the motorboat is moving upstream, its speed relative to the ground is 12 km/h, so its speed relative to the raft is again 15 km/h.

Converted to m/min, the relative speed is:

15 km/h × (1000 m/km) × (1 h / 60 min) = 250 m/min

It takes the motorboat 16 minutes to travel to the front of the raft and back.  Since the speed is the same in both directions, the motorboat takes 8 minutes to travel the length of the raft.

So the length of the raft is 250×8 = 2000 meters.

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3 years ago
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Gelneren [198K]

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Step-by-step explanation: add it normally but carry the x

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3 years ago
Interval does h have a negative average of change
NikAS [45]

The average rate of change over some interval [a, b] is equal to the slope of the secant line from (a, h(a)) to (b, h(b)).

h(t) is a quadratic function, so its graph is a parabola, and in particular it's one that has a minimum of -4 when t = 2.

The secant line over an interval [a, b] will have a negative slope if the distance from a to 2 is larger than the distance from b to 2.

(A) If a = 4 and b = 5, then |a - 2| = 2 and |b - 2| = 3, so the slope and hence average rate of change is positive.

(B) If a = -1 and b = 5, then |a - 2| = 3 and |b - 2| = 3, so this ARoC is zero.

(C) If a = 0 and b = 4, then |a - 2| = 2 and |b - 2| = 2, so this ARoC is also zero.

(D) If a = -1 and b = 4, then |a - 2| = 3 and |b - 2| = 2, so this ARoC is negative.

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3 years ago
Bart works 36 hours a week and makes $612. Charles works 34 hours and makes $663.who makes more per hour?
Inessa05 [86]
Charle's makes more per hour.
3 0
3 years ago
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