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Tcecarenko [31]
2 years ago
14

Given x || y.

Mathematics
1 answer:
ivanzaharov [21]2 years ago
6 0
Angles 1 and 2 are supplementary because they add up to 180°
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After traveling exactly half of its journey from station A to station B, a train was held up for 10 minutes. In order to arrive
Alex17521 [72]
Let's define variables:
 s = original speed
 s + 12 = faster speed
 The time for the half of the route is:
 60 / s
 The time for the second half of the route is:
 60 / (s + 12)
 The equation for the time of the trip is:
 60 / s + 60 / (s + 12) + 1/6 = 120 / s
 Where,
 1/6: held up for 10 minutes (in hours).
 Rewriting the equation we have:
 6s (60) + s (s + 12) = 60 * 6 (s + 12)
 360s + s ^ 2 + 12s = 360s + 4320
 s ^ 2 + 12s = 4320
 s ^ 2 + 12s - 4320 = 0
 We factor the equation:
 (s + 72) (s-60) = 0
 We take the positive root so that the problem makes physical sense.
 s = 60 Km / h
 Answer:
 
The original speed of the train before it was held up is:
 
s = 60 Km / h
8 0
3 years ago
a polynomial has one quadratic factor and 3 linear factors. One of the linear factors has multiplicity two. What is the degree o
snow_lady [41]

Answer:

5

Step-by-step explanation:

a polynomial has one quadratic factor and 3 linear factors. One of the linear factors has multiplicity two. What is the degree of the polynomial

A polynomial with one quadratic obtains the forms ( ax² +bx +c ) with 3 linear factors.

Suppose the three linear fractions are :

(x- P) (x-Q) (x- R)

∴

The polynomial = ( ax² +bx +c )(x- P) (x-Q) (x- R)

By factorization, the highest degree of the polynomial = 5

8 0
3 years ago
Someone pls Help me out!!!
Law Incorporation [45]

Answer:

Gasoline = 10.2 * 3.80= 38.76

Water= 3 * 3.98 = 11.94

Ice- 3 * 1.99 = 5.97

Oranges= 1 * 8.89 = 8.89

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
(-2.4) - 0.8 times -4.3
ICE Princess25 [194]

Answer is this:

1.04                      

7 0
3 years ago
Differentiate with respect to x:<br> log(cosx +sinx)
vampirchik [111]
I don’t understand this brother plzz explain it better
6 0
3 years ago
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