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Hoochie [10]
4 years ago
6

100 meter long Christmas train needs 30 seconds to cross a 400nmetrr long bridge assuming the train goes at a steady speed how f

ast is it
Mathematics
1 answer:
Delicious77 [7]4 years ago
7 0
Since it's 100m long, to cross the front needs to go 500m. 500/30= (16+2/3)meters per second
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Slope is used for which of the following situations? Slope is used to determine if lines are parallel. Slope is used to determin
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Answer: the last option

Step-by-step explanation:

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Name the coordinates of M(-5, 8) under a translation along the vector < 3, -2 >.
Natasha_Volkova [10]
Are there any answers to choose from ?
8 0
3 years ago
Can I get some help somebody? reward brainiest
OLEGan [10]

Answer:

Step-by-step explanation:

1). x² - 8x

  To convert this expression into a perfect square trinomial,

  x² - 2(4x) + 4² = (x - 2)²

  Therefore , 4² = 16 should be added.

  Option (4) is the answer.

2). x² + 2x = 3

   x² + 2(1)(x) = 3

   x² + 2(1)(x) + 1 = 3 + 1 [By adding 1 on both the sides]

   (x + 1)² = 4

    x + 1 = ±2

    x = -3, -1

   Option (1) is the answer.

3). 3x²- 18x = 21

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6 0
3 years ago
How do you solve this?
iragen [17]

                  - - - - - - - - - - - - - - - - - - - - - - - - - - -

\large\blue\textsf{\textbf{\underline{\underline{Question:-}}}}

How do you solve this? [question in attachment]

\large\blue\textsf{\textbf{\underline{\underline{Answer and How to Solve:-}}}}

In order to find the perimeter of a shape, we should add all of its sides.

Since a triangle has only 3 sides, we add 3 sides together, like so:-

      ⇒ 9x-7+12x-13+3x+8

Combine like terms:-

    ➪ 9x+12x+3x-7-13-8

Which simplifies to

     ➪9x+15x-7-21

On further simplification,

➪24x-28

So we conclude that the perimeter of the triangle is 24x-28 units.

<h3 /><h3>Good luck.</h3>

              - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

7 0
2 years ago
PLEASE HELP!!!<br> A)<br> B)<br> C)<br> D)
Vlad1618 [11]

Answer:

b i think

Step-by-step explanation:

4 0
3 years ago
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