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Fiesta28 [93]
3 years ago
13

21 trucks, each with a 2.5-ton payload, are needed to unload a freight train. How many trucks, each with a 3.5-ton payload, woul

d be needed to do the same job? What is the constant of variation?
Mathematics
1 answer:
castortr0y [4]3 years ago
6 0
Tons needed to unload a freight train= 21×2.5 =52.5
number of 3.5-ton payload trucks needed to unload a freight train=52.5÷3.5 = 15

15 Trucks , Each With A 3.5-Ton Payloaf , Would be Needed To Do The Same Job. 

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6x + 7y = 1<br> 8x – 3y = 25<br> Solve me fast explainly
Elenna [48]

Answer:

{x,y} = {89/37,-71/37}

Step-by-step explanation:

 8x = 3y + 25

 [2]    x = 3y/8 + 25/8

Plug this in for variable  x  in equation [1]

  [1]    6•(3y/8+25/8) + 7y = 1

  [1]    37y/4 = -71/4

  [1]    37y = -71

Solve equation [1] for the variable  y  

  [1]    37y = - 71

  [1]    y = - 71/37

By now we know this much :

   x = 3y/8+25/8

   y = -71/37

Use the  y  value to solve for  x  

   x = (3/8)(-71/37)+25/8 = 89/37

5 0
3 years ago
N(x)=2x+7;(x)=17, what is the value of x so that the function has a given value
miskamm [114]
2(17)+7

34+7

N(17)=41

Brainliest?
5 0
3 years ago
For which values of x will the rational expression below be undefined? Check
ololo11 [35]

Answer:

-2

Step-by-step explanation:

For the given expression to be undefined, this means that the denominator must be zero.

From the given expression, the denominator is x + 2

Equating this to zero;

x+2 = 0

Subtract 2 from both sides

x+2-2 = 0 -2

x = -2

Hence the value of x that makes it undefined is -2

3 0
3 years ago
Each weekday Davina rides her bike from her house to school. After school, she rides to the library. Then Davina takes the same
marin [14]

Answer:

I believe the answer is 20

Step-by-step explanation:

She rides from her house to school which is 4 kilometers. Then she rides from school to the library which is 6 kilometers. The total so far is 10 kilometers.The question then says she takes the same route home so you would multiple 10 by 2 so the answer should be 20 kilometers

3 0
3 years ago
Read 2 more answers
3 x 2/5 Multiplying Fractions
Softa [21]

Answer:  6/5  or  1 1/5 <--- (SIMPLIFIED)

~hope this helped, have a gr8 day/night my friend!~

Step-by-step explanation:

3 0
3 years ago
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