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4 years ago

A train leaves Boston at 4:00 PM. A second train leaves the same city in the same direction at 8:00 PM. The second train travels

Mathematics

1 answer:

Elden [556K]4 years ago

8 0

Answer:

42 mph
126 mph

Step-by-step explanation:

It takes 2 hours for the second train to catch the first, so the first must have had a head start of (2 h)(84 mi/h) = 168 miles.

The first train achieved that head start in 4 hours, so its speed was ...

(168 mi)/(4 h) = 42 mi/h

The second train was 84 mi/h faster so its speed was ...

42 mi/h + 84 mi/h = 126 mi/h

___

The two trains met at a distance of 252 miles from Boston.

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ExtremeBDS [4]

It depends on the definition of day, solar day or stellar day.
Explanation: Solar day: 1 day = 24h
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3 years ago

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mr Goodwill [35]

Answer: 2

Step-by-step explanation: 1/2 x 4 = 4/2 = 2/1 = 2.

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3 years ago

A straight line has a slope of 2.08. Calculate the angle that the line makes with the x (horizontal) axis.

zubka84 [21]

Answer:

The angle that the line makes with x-axis of of 64.3º.

Step-by-step explanation:

Equation of a line, and angle with the x axis:

The equation of a line has the following format:

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In which m is the slope.

The angle that the line makes with the x axis is given by the angle which has tangent m, that is, $a = \tan^{-1}{m}$ .

In this question:

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The angle that the line makes with x-axis of of 64.3º.

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3 years ago

En una tienda se anuncia la rebaja de 20% en todos sus artículos . Rafael elije una camisa y al llegar a la caja le informan que

dimulka [17.4K]

Responder:

$ 750

Explicación paso a paso:

Dado que :

Descuento en todos los artículos = 20%

Descuento adicional dado = 15%

Monto final pagado por la camisa = $ 510

Precio de la camiseta sin descuento:

Sea el precio inicial de la camisa = x

Primer descuento obtenido = 20%

Precio pagado después de un descuento adicional del 15%

Primer descuento:

(1 - 0,20) * x = 0,8x

Segundo descuento:

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x = $ 750

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3 years ago

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Svetllana [295]

Answer:

Step-by-step explanation:

A -8/5 = -1.6 which is less than 0.625 because 0.625 is closer to zero

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3 years ago