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zhenek [66]
4 years ago
10

Answer for 23? Anybody?

Mathematics
1 answer:
Genrish500 [490]4 years ago
3 0
You should download this app called Slader. It has al the answers in it
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It takes the high-speed train x hours to travel the z miles from Town A to Town B at a constant rate, while it takes the regular
tatyana61 [14]

Answer:

S=  z (y-x)/(x+y)

Step-by-step explanation:

Lets the speed of high speed train = u

Lets the regular speed train = v

We know that

Distance = Speed x time

For high speed train

 z = u .x      

    u= z/x                  ----------1

For regular speed train

 z = v .y    

v = z/y             -------------2

Both are traveling in opposite direction so relative speed

Vr = z / x+ z /y

Lets in time t they will meet

z = (z / x+ z /y) t

t= xy/ (x+y)

Lets take distance  cover by high speed train is m when it moves A to B and  speed cover by regular train is n when it is moving B to A.They meet at time t.

m = u .t

m = z / x .xy/ (x+y)

m = zy/ (x+y)            -----------3

n = v .t

n = z / y .xy/ (x+y)

n = zx/ (x+y)              -----------4

From equation 3 and 4

So

m - n= zy/ (x+y)   - zx/ (x+y)      

S=  z (y-x)/(x+y)

Option a is correct.

4 0
3 years ago
What's greater 5.05 or 5.050
Ad libitum [116K]
5.05 = 5.050
So, the numbers 5.05 and 5.050 are equal.
6 0
3 years ago
Please find question in photo below. I’m revising for a test I have in a few days, and I can’t figure this out. Please help!
Temka [501]

\large{\rm{\underline{\underline{Answer:}}}}

a) <u>n² + 6 </u>

~Here n is the number of term. So, put n = 1,2,3,4.... to get the term.

  • If n = 1, first term = 1² + 6 = 7
  • n = 2, second term = 10
  • n = 3, third temm = 15
  • n = 4, fourth term = 22
  • n = 10, tenth term = 106

b) <u>3n²</u>

  • If n = 1, first term = 3
  • n = 2, second term = 12
  • n = 3, third term = 27
  • n = 4, fourth term = 48
  • n = 10, tenth term = 300
3 0
3 years ago
In △ABC, AB = 13, AC = 20, BC = 21. Find the length of the altitude AD
nika2105 [10]

The length of the altitude AD is 12 units.

<h3>How to find the height of a triangle?</h3>

The height of the triangle can be found as follows:

We have to find an angle using cosine law before  we can find the height.

Therefore,

20² = 13² + 21² - 2 × 21 × 13 cos B

400 = 169 + 441  - 546 cos B

400 - 610 = - 546 cos B

-210 = - 546 cos B

cos B = -210 / -546

cos B = 0.38461538461

B = cos⁻¹ 0.38461538461

B = 67.3810899783

B = 67.38°

Hence,

sin 67.38° = opposite / hypotenuse

sin 67.38° = AD / 13

cross multiply

AD = 13 sin 67.38°

AD = 11.9999882145

AD = 12 units

learn more on triangle here: brainly.com/question/13387814

#SPJ1

6 0
2 years ago
What are 4 factors of 56 and 62
NeX [460]

Factors of 56 are: 1, 2, 4, 7, 8, 14, 28, 56

Factors of 62 are: 1, 2, 31, 62

8 0
3 years ago
Read 2 more answers
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