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2 years ago

A train covers 15 miles in 20 minutes. How far will it travel in 6 hours assuming that it continues at the same speed?

Mathematics

1 answer:

notka56 [123]2 years ago

7 0

Answer:

270

Step-by-step explanation:

6 x 60 = 360

360/20 = 18

18 x 15 = 270

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What is a solution to the equation x 2 = 121.

gizmo_the_mogwai [7]

x=11,-11 there you go

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3 years ago

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¿cuáles son los criterios de congruencia y semejanza de triángulo?

mars1129 [50]

Answer:

Two triangles are similar if they meet one of the following criteria. : Two pairs of corresponding angles are equal. : Three pairs of corresponding sides are proportional. : Two pairs of corresponding sides are proportional and the corresponding angles between them are equal.

Dos triángulos son similares si cumplen uno de los siguientes criterios. : Dos pares de ángulos correspondientes son iguales. : Tres pares de lados correspondientes son proporcionales. : Dos pares de lados correspondientes son proporcionales y los ángulos correspondientes entre ellos son iguales.

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3 years ago

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What are the square roots of 1?

Marta_Voda [28]

Answer:

Step-by-step explanation:

1^2=1

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2 years ago

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I don't need you to work it out, just theorem(s) i need to reach the answer :)

VikaD [51]

Not sure why such an old question is showing up on my feed...

Anyway, let $x=\tan^{-1}\dfrac43$ and $y=\sin^{-1}\dfrac35$ . Then we want to find the exact value of $\cos(x-y)$ .

Use the angle difference identity:

$\cos(x-y)=\cos x\cos y+\sin x\sin y$

and right away we find $\sin y=\dfrac35$ . By the Pythagorean theorem, we also find $\cos y=\dfrac45$ . (Actually, this could potentially be negative, but let's assume all angles are in the first quadrant for convenience.)

Meanwhile, if $\tan x=\dfrac43$ , then (by Pythagorean theorem) $\sec x=\dfrac53$ , so $\cos x=\dfrac35$ . And from this, $\sin x=\dfrac45$ .

So,

$\cos\left(\tan^{-1}\dfrac43-\sin^{-1}\dfrac35\right)=\dfrac35\cdot\dfrac45+\dfrac45\cdot\dfrac35=\dfrac{24}{25}$

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3 years ago

Finally, the arena decides to offer advertising space on the jerseys of the arena’s own amateur volley ball team. The arena want

bagirrra123 [75]

Answer: 7/50

14%

1/30

Step-by-step explanation:0.14 to fraction =0.14/100=14/100=7/50

0.14 to %= 0.14 ×100=14%

Total number of balls=6

Blue balls=2

Golden balls=2

Green balls=2

Probability of picking the first ball=1/6

Probability of picking the second ball= 1/5

P(winning wit 2 golden balls)=1/6×1/5=1/30

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3 years ago