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Mashcka [7]
2 years ago
15

a train covers a distance at an average speed of 60km / hr in 12 hours. what should be the speed of the train if the same distan

ce is to be covered in 10 hours
Mathematics
1 answer:
olya-2409 [2.1K]2 years ago
4 0

Step-by-step explanation:

Distance = speed x time = 60 x 12 = 720 km. Speed = 72 km / h

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What is 875x132 written out in long multiplication
lukranit [14]
857 x 132= 113,124
work is showed in the image

7 0
3 years ago
Please help!? 5 Stars! :0 :(
zvonat [6]

OK.  These problems are easy if you know the quadratic formula,
and they're impossible if you don't.

Here's the quadratic formula:

When the equation is in the form of      Ax² + Bx + C = 0

then                    x =  [ -B plus or minus √(B²-4AC) ] / 2A

I'm sure that formula is in your text or your study notes,
right before these questions.  You should cut it out or
copy it, and tape it inside the cover of your notebook.
Then, you'll always have it when you need it, until
you have it memorized and can rattle it off.

The first question says        3x²  +  5x  +  2  = 0

Is this in the form of             Ax²  +  Bx  +  C  = 0    ?

             Yes !                    A=3      B=5   C=2

             so you can use the quadratic formula to solve it.

            x =  [ -B plus or minus √(B²-4AC) ] / 2A

               =  [ -5 plus or minus √(5² - 4·3·2) ] / 2·3

               =  [ -5 plus or minus √(25 - 24)  ]  /  6

               =  [  -5 plus or minus  √1          ]  /  6

           x  =        -4 / 6  =  -2/3
and
           x  =        -6 / 6  =  -1 .    
_______________________________________

The second question says

                                         4x²  +  5x  -  1 = 0

Is this in the form of          Ax²  +  Bx + C = 0  ?

           Yes it is !            A=4     B=5   C= -1  

         so you can use the quadratic formula to solve it.

            x =  [ -B plus or minus √(B²-4AC) ] / 2A

Now, you take it from here.

6 0
2 years ago
What fraction is equal to 30/6
anzhelika [568]
5/1, 15/3, and 10/2 are all valid answers to that question.
3 0
3 years ago
Read 2 more answers
HELP ME PLEASEEEEEE
mel-nik [20]

Answer:

5

Step-by-step explanation:

4(12)+2÷10

48+2÷10

50÷10

5

3 0
3 years ago
Read 2 more answers
PLEASE HELP!!
Alja [10]

Answer:

B choice

Step-by-step explanation:

y = mx + b

where m = slope and b = y-intercept.

The value of m is 3/4. That means slope is 3/4. Changing 3/4 to - 3/4 will make the slope become negative. Therefore the answer is B.

4 0
3 years ago
Read 2 more answers
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