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2 years ago

2 T

Mathematics

1 answer:

katrin [286]2 years ago

7 0

Answer:

Step-by-step explanation:

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KATRIN_1 [288]

Answer:

The 4th option is the correct answer

Step-by-step explanation:

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2 years ago

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David drops a ball from the top of a building with a height of 64 feet. The height (h) of the ball, in feet, after (t) seconds c

prohojiy [21]

Answer:

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2 years ago

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mezya [45]

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2 years ago

a plane averaged 400 mph on a trip going east, but only 280 mph on the return trip. The total flying time in both directions was

Liula [17]

Answer:

1400 miles

Step-by-step explanation:

Speed is the time rate of change of distance. It is the ratio of distance to time and is given by the equation:

$Speed(S) = \frac{distance(d)}{time(t)}\\ S=\frac{d}{t}$

plane averaged 400 mph on a trip going east, but only 280 mph on the return trip.

The time spent (t₁) in going east is given by:

$S=\frac{d}{t_1}\\ t_1=\frac{d}{S} =\frac{d}{400mph}$

The time spent (t₂) in going east is given by:

$S=\frac{d}{t_2}\\ t_2=\frac{d}{S} =\frac{d}{280mph}$

The total time (t) = t₁ + t₂

t = t₁ + t₂ = 8.5 hours

$\frac{d}{400}+\frac{d}{280} =8.5\\280d+400d=952000\\680d=952000\\d=1400miles\\$

Therefore the one way distance is 1400 miles

7 0

2 years ago

30 POINTS IF U CAN HELP PLEASE. in the figure below, a tangent and a secant are drawn to a circle from the exterior point E. Sup

dimulka [17.4K]

Answer:

19.5 = CD

Step-by-step explanation:

The square of the tangent = the the whole secant times the outside part of the secant.

EG²= (ED)(EC)

13² = (26)(EC)

169 = 26EC

169/26 = EC

6.5 + EC

Now ED = EC + CD

26 = 6.5 + CD

26 - 6.5 = CD

19.5 = CD

3 0

2 years ago