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3 years ago

12 ly

Mathematics

1 answer:

lesya [120]3 years ago

6 0

Answer:

option C is the correct answer

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Two trains on opposite tracks leave the same station at the same time. One train travels at an average speed of 80 kilometres pe

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Answer:

20 minutes

Step-by-step explanation:

The trains are separating at the rate of 80 +70 = 150 km/hour. The time required to be 50 km apart is then ...

time = distance/speed = (50 km)/(150 km/h) = 1/3 h = 20 minutes

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3 years ago

Whats the product of (-3x+2y)(4x-y)

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Answer:

-12x^2 + 11xy - 2y^2

Step-by-step explanation:

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Find the value of x in the triangle shown below

CaHeK987 [17]

Answer:

Step-by-step explanation:

Apply sine formula:

$\frac{sin \: a}{a} = \frac{sin \: b}{b} = \frac{sin \: c}{c}$

$\frac{sin \: a}{a} = \frac{sin \: c}{c}$

Plug the values

$\frac{sin \: (88)}{6.9} = \frac{sin \: x}{5}$

Apply cross product property

$5 \: sin \: (88) = 6.9 \: (sin \: x)$

$\frac{5 \: sin \: (88)}{6.9} = sin \: x$

$x = {sin}^{ - 1} ( \frac{5 \: sin \:( 88)}{6.9} )$

$x = 46.4$

Hope this helps .....

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3 years ago

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Write the trinomial as a square of a binomial<br> x^2+2xy+y^2

vitfil [10]

Answer:

$\large\boxed{x^2+2xy+y^2=(x+y)^2}$

Step-by-step explanation:

$(x+y)^2=(x+y)(x+y)\\\\\text{Use FOIL}\ (a+b)(c+d)=ac+ad+bc+bd\\\\=(x)(x)+(x)(y)+(y)(x)+(y)(y)=x^2+xy+xy+y^2=x^2+2xy+y^2$

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Alexxx [7]

The answer would be c

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