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vivado [14]
2 years ago
10

Q25 A train travelling at a speed of 30km/h crosses a bridge 25m long in 12 sec. How long will it take to overtake a another tra

in 25m long travelling at 20km/hr? ​option given 1. 72 sec 2. 74 sec 3. ,75 sec or data insufficient.
Mathematics
1 answer:
Makovka662 [10]2 years ago
8 0

Answer:

WHAT

Step-by-step explanation:

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PLEASE HELP 20 POINTS<br> solve the system of equations y=-5x-7 and -4x-3y=-1 by substitution.
Ainat [17]

Answer:

Solution: x = -2; y = 3 or (-2, 3)

Step-by-step explanation:

<u>Equation 1:</u>  y = -5x - 7  

<u>Equation 2:</u> -4x - 3y = -1

Substitute the value of y in Equation 1 into the Equation 2:

-4x - 3(-5x - 7)  = -1

-4x +15x + 21 = -1

Combine like terms:

11x + 21 =  - 1

Subtract 21 from both sides:

11x + 21 - 21 =  - 1 - 21

11x = -22

Divide both sides by 11 to solve for x:

11x/11 = -22/11

x = -2

Now that we have the value for x, substitute x = 2 into Equation 2 to solve for y:

-4x - 3y = -1

-4(-2) - 3y = -1

8 - 3y = -1

Subtract 8 from both sides:

8 - 8 - 3y = -1 - 8

-3y = -9

Divide both sides by -3 to solve for y:

-3y/-3 = -9/-3

y = 3

Therefore, the solution to the given systems of linear equations is:

x = -2; y = 3 or (-2, 3)

Please mark my answers as the Brainliest if you find this helpful :)

7 0
2 years ago
Sam makes about 79% of his free throws. he shoots 60 free throws. about how manywill he make?
nataly862011 [7]
Hey You!

60 * 79% = 47.4

You can solve it by:

(60 ÷ 100 × 79 = 47.4)

Sam will make 47.4 of his throws.
5 0
2 years ago
Read 2 more answers
Examine the word PROBABILITY, if a letter is picked at random, find probability that 13 was picked. The number picked did not in
DerKrebs [107]

Answer:

-19

Step-by-step explanation:

8 0
3 years ago
Verbal expression for 9a2
Brilliant_brown [7]
If the 2 is little and on top of the a, then it's called "nine a squared."
4 0
2 years ago
Read 2 more answers
What all are the factors off 453,738
vazorg [7]

Answer:

1, 2, 3, 6, 47, 94, 141, 282, 1609, 3218, 4827, 9654, 75623, 151246, 226869, 453738

Step-by-step explanation:

I looked it up

6 0
3 years ago
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