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mars1129 [50]
3 years ago
10

A train of length 180 m approaches a tunnel of length 620 m.

Mathematics
1 answer:
igor_vitrenko [27]3 years ago
7 0
After coming out of the tunnel it has to travel it's own length to pass through the tunnel completely. So the train of length 180 metres takes 0.889 seconds to pass through a tunnel of length 680 metres completely.
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Find the equation of the line given the slope and the y-intercept
GREYUIT [131]

Answer:

y = \frac{1}{2}x + 3

Step-by-step explanation:

The equation for a linear graph is usually written in the following format...

y = mx + b

Where m would be the slope, usually referring to rise over run and b would be the y-intercept (where the line crosses the y-axis). From the graph, we can see that the line crosses the y-axis at point 3 so b would be 3. The graph also shows us that for every 1 value that the line rises it moves to the right 2 values. Therefore, the slope would be 1/2. Using these values we can create the following equation...

y = \frac{1}{2}x + 3

7 0
3 years ago
the first three steps of completing the square to solve the quadratic equation X2+4X-6=0 are shown below. what re the next 3 ste
Vilka [71]

Answer:

see the explanation

Step-by-step explanation:

<u><em>The complete question is</em></u>

The first three steps of completing the square to solve the quadratic equation x2 +4x -6= 0, are shown below.

Step 1: x2 +4x= 6

Step 2: x2 +4x+4=6+4

Step 3: (x +2)^2=10

What are the next 3 steps?​

we have

step 4

Take square root both sides

\sqrt{(x+2)^2} =\sqrt{10}

step 5

Simplify

x+2=\pm\sqrt{10}

step 6

Solve for x

subtract 2 both sides

x=-2\pm\sqrt{10}

x_1=-2+\sqrt{10}

x_2=-2-\sqrt{10}

3 0
2 years ago
The house numbers on the north side of Flynn Street are even. In one block, the house numbers begin 1022, 1032, 1042, and 1052.
never [62]

Answer:

  6 houses away

Step-by-step explanation:

You can write down the house numbers and count them:

  1032, 1042, 1052, 1062, 1072, 1082

1082 is the 6th house from where Taylor is.

___

You can also recognize that (1082 -1022)/10 = 60/10 = 6 is the number of houses away from the house at 1022.

4 0
3 years ago
Please help me!!!!!!!!
sergejj [24]

Answer:

Angle 1: 105

Angle 2: 75

Step-by-step explanation:

You know 2 is 75 because both lines are parallel.

To get 1 you subtract 75 from 180.

6 0
3 years ago
Read 2 more answers
How to solve f(-3)= -2x^2+5x
Sauron [17]
Replace all the x values with -3 

f(-3)=-2(-3)^2+5(-3) 
f(-3)=2(9)-15
f(-3)=18-15 
f(-3)=3 

Hope I helped :) 
4 0
3 years ago
Read 2 more answers
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