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2 years ago

50 points for good answ.

Mathematics

1 answer:

amid [387]2 years ago

5 0

Answer:

Step-by-step explanation:

Let the distance be d and average speed be v.

Half of the distance the speed was 2/3v

Let the speed be xv in the second half of the distance.

d/v = d/2 : (2/3v) + d/2 : (xv)
d/v = 3/4(d/v) + (1/2x)(d/v)
1 = 3/4 + 1/2x
1/2x = 1 - 3/4
1/2x = 1/4
2x = 4
x = 2

The rest of the road car has to ride with speed of 2v

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Which statements are true about the trigonometric ratios of this triangle

rosijanka [135]

Answer:

Options (1), (2), (3) and (4)

Step-by-step explanation:

By applying the sine and cosine rules in the given triangle,

sinθ = $\frac{\text{Opposite side}}{\text{Hypotenuse}}$

cosθ = $\frac{\text{Adjacent side}}{\text{Hypotenuse}}$

cos(30°) = $\frac{AC}{AB}$

= $\frac{11\sqrt{3} }{22}$

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sin(30°) = $\frac{BC}{AB}$

= $\frac{11}{22}$

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cos(60°) = $\frac{BC}{AB}$

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2 years ago

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Answer:

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3 years ago

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IRINA_888 [86]

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3 years ago

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Inessa05 [86]

Answer:

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2 years ago

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If the endpoints of ST are S (1,4) and T (5,2) then the midpoint is in Quadrant IV?

irina [24]

It is false that the midpoint is in quadrant IV

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(x, y) = (3, 3)

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Hence, it is false that the midpoint is in quadrant IV