MUST KNOW THEM ALL TO ANSWER It took 400 rails to create one mile of track. Each rail had ten (10) spikes. Each spike needed three (3) strikes from a hammer. A fast crew could lay four (4) rails in one minute. Crews averaged five (5) miles of track per day. If the distance from Rock Island, Illinois to Sacramento, California is approximately 1800 miles: How many rails were needed? How many spikes were nceded? How many hammer strikes were heard each hour? How many days were needed to complete the track? ​

Answers

Answer 1

Answer:

I think 1440 rails.........


Related Questions

write down the next two terms of each of the following sequences

1.
[tex] \frac{3}{4} \frac{1}{2} \frac{1}{3} \frac{2}{9} [/tex]
Pattern :

2.
9, 13, 22, 38​

Answers

Answer:

ygfgjuhggffffffthbbvftyyhh hhggtyy hhgf hggff hggff hhgf vgt

There is a bag filled with 3 blue and 5 red marbles.
A marble is taken at random from the bag, the colour is noted and then it is not replaced.
Another marble is taken at random.
What is the probability of getting exactly 1 blue?

Answers

Answer: The probability is 0.536

Step-by-step explanation:

We have 3 blue marbles, and 5 red marbles (a total of 3 + 5  = 8 marbles)

First, we take a marble and it is not replaced.

Then we take another marble.

We want to calculate the probability of getting only one blue marble.

Then we have two cases:

1) First we take a blue marble, and after a red marble

2) First we take a red marble, and after a blue marble.

Let's calculate the probability of these two events:

1) The probability of taking a blue marble at random, is equal to the quotient between the number of blue marbles, and the total number of marbles.

this is: p1 = 3/8.

Now we need to take a red marble. Same procedure as before, but now we already taken a marble from the bag, so the total number of marbles is 7 now, and the number of red marbles is 5. The probability here is:

p2 = 5/7

The joint probability (the probability of both events happening) is equal to the product between the individual probabilities, this is:

P = p1*p2 = (3/8)*(5/7) = 0.268

2) Now we first take a red marble, we can calculate the probabilities in the same way than above.

The probability of taking a red marble at first is:

q1 = 5/8

The probability of taking a blue marble in the second draw is:

q2 = 3/7

The joint probability is:

Q = p1*p2 = (5/8)*(3/7) = 0.268

The total probability of getting only one blue marble will be equal to the addition of both the probabilities we found.

Probability = P + Q = 0.268 + 0.268 = 0.536

In the figure shown, ABCD is a square and triangle CDE is equilateral. What is the degree measure of angle CBE?

Answers

Answer:

angle CBE=15 degrees

Step-by-step explanation:

angle ECD is 60 degrees and EC=CD because equilateral triangle

angle DCB is 90 degrees and CB=CD because square

angle ECD +angle DCB= angle ECB

60+90=150=angle ECB

since triangle ECB has legs EC and CB  equal in length, then it is an isosceles triangle.

so angles CBB and CBE are equal

angle CBE=(180-150)/2

angle CBE=15 degrees

Answer:

15 degrees

Step-by-step explanation:

Since triangle CDE is a equilateral triangle then all the sides and angles are congruent DC=CE=ED, ∠DEC=∠ECD=∠CDE=60 degrees

since line CD is also a side of the square and all sides of a square are congruent therefore DC=CB=BA=AD

therefore side BC is equal to side CE which means CBE is an isosceles triangle then angles ∠BEC and ∠CBE are congruent

Then in order to figure out angle ∠CBE we need to find ∠ECB

and ∠ECB=∠DCE+∠DCB

∠DCE= 60 degrees because it's a equilateral triangle

∠DCB=90 degrees because it's a square

therefore ∠ECB=150 degrees

all angles of a triangle = 180 degrees

∠BEC + ∠CBE + ∠ECB = 180

since ∠BEC is congruent to ∠CBE i can substitute ∠BEC for ∠CBE

2(∠CBE) + 150 =180

2(∠CBE)=30

∠CBE=15

I WILL GIVE BRAINLIEST TO THE BEST ANSWER URGENT

use frequency column i think

Answers

Answer:the median is 71

Step-by-step explanation:

The triangle shown below has an area of 4 units^2 squared. Find the missing side.

Answers

Answer:

X=44

Step-by-step explanation:

For each diagram below, determine the value of, x if possible. If the triangles are congruent, a state which triangle congruence condition you used. If the triangles are not congruent or if there is not enough information, state, “Cannot be determined”.

Answers

Answer:

The Triangles are congruent by Angle-Side-Angle.

x would equal 4 because the triangles are congruent.

Step-by-step explanation:

Where would the coordinate (-3, 4) be if it was translationed in the following way: (x,y)----> (x -2, y +2)

Answers

Answer:

(-5, 6)

Step-by-step explanation:

Please let me know if you want me to add an explanation as to why this is the answer. I can definitely do that, I just wouldn’t want to write it if you don’t want me to :)

Find the slope of the line through each pair of points.
( 1,4),(-8,- 20 )

Answers

Answer:

24/9

Step-by-step explanation:

-20-4=-24

-8-1=-9

I don't understand how to do this​

Answers

Answer:

20 degrees

Step-by-step explanation:

You know that the three angles will add up to 180 degrees, so you can make an equation:

3x (angle 1) + 2x + 20 (angle 2) + 5x - 40 (angle 3) = 180

3x + 2x + 20 + 5x - 40 = 180

Then, solve

combine like terms

10x - 20 = 180

add 20 to both sides

10x = 200

divide both sides by 10

x = 20 degrees

Step-by-step explanation:

3x+5x-40+2x+20=180°{sum of triangles}

10x-20=180

10x=180+20

x=200

10

x=20°

hope it helps.

PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! I DONT KNOW HOW TO GRAPH SO
PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! I DONT KNOW HOW TO GRAPH SO CAN YOU SHOW ME HOW TO DO IT PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!! PLS DRAW IT

Is there a solution YES OR NO AND WHAT IS THE SOLUTION?

Answers

Answer:

(-1, -2) will be the solution.

Step-by-step explanation:

System of equations has been given as,

y = 3x + 1 ---------(1)

Input-output value table for the given line will be,

x       -2        -1          0          1

y      -5        -2         1           4

y = -x - 3 ----------(2)

Input-output value table for the given line will be,

x        -2         -1           0           1

y       -1          -2          -3         -4  

By plotting the given coordinates we can draw the straight lines.

And the point of intersection (common point) of these lines will be the solution of the given system of equations.

Hence, (-1, -2) will be the solution.

Thirty percent of Irma’s Boutique’s sales came from leggings. They sold $390 worth of leggings last week. What were the total sales for the Boutique last week?

Answers

Answer:

The total sales of Boutique last week = $1300

Step-by-step explanation:

Given that:

Percent of sales came from leggings = 30%

Worth of leggings sold = $390

Let,

x be the total sales in the week.

30% of x = 390

[tex]\frac{30}{100}x=390[/tex]

0.3x = 390

Dividing both sides by 0.3

[tex]\frac{0.3x}{0.3}=\frac{390}{0.3}\\x=1300[/tex]

Hence,

The total sales of Boutique last week = $1300

Salvador had 3.25 pounds of dry cement he used 1.7 pounds to make a paver for his lawn how many pounds of dry cement does Salvador have left

Answers

Answer:
1.55

Explanation:
3.25 - 1.7 = 1.55

If the sum of a number and seven is doubled, the result is six less than the number. Find the number

Answers

Answer:

-20

Step-by-step explanation:

Let the number be Y

If the sum of a number and seven is doubled, the result is six less than the number, The statement is as expressed below

2(Y+7)= Y-6

Find the value of Y

2Y+14=Y-6

Put the like terms together

2Y-Y=-6-14

Y=-20

The number is therefore -20

Verifying

2(-20+7)=-20-6

2(-13)=-26

-26=-26

(-4)(-6)
I need help

Answers

Answer:

it means -4×-6=24 is the answer

Answer:

24

Step-by-step explanation:

So you just multiply 6 times 4 and then they are two negatives so that makes a positive.

Please help me on this one​

Answers

Answer:

The Correct Answer Is H

Step-by-step explanation:

Its Order Corresponds idenically to the graph above.

What is %65 simplified in simplest form

Answers

Answer:

0.65

I think..........

answers for the 2 boxes please :)​

Answers

Answer:

(0, 3 )

Step-by-step explanation:

Given the 2 equations

x + 3y = 9 → (1)

- 2x + 2y = 6 → (2)

Multiplying (1) by 2 and adding to (2) will eliminate the x- term

2x + 6y = 18 → (3)

Add (2) and (3) term by term to eliminate x, that is

0 + 8y = 24

8y = 24 ( divide both sides by 8 )

y = 3

Substitute y = 3 into either of the 2 equations and solve for x

Substituting into (1)

x + 3(3) = 9

x + 9 = 9 ( subtract 9 from both sides )

x = 0

solution is (0, 3 )

X= 0 y= 3
You have to make either the xs or ys the same so you could find out the other value first

Help please :(

Use the table below to asnwer this question:

Find the average rate of charge for the given fuction from x=0 to x =2

A. 1
B. 2
C. 4
D. -4

Answers

Answer:

D

Step-by-step explanation:

The change from x = 0 to x = 1 is -3

The change from x = 1 to x = 2 is -5

The average of -3 and -5 is [tex]\frac{-3-5}{2} = \frac{-8}{2} = -4[/tex]

The answer is D. -4

For the equation 8x + 2y = 16 What is the slope? What is the y-intercept (write as an ordered pair)? What is the x-intercept (write as an ordered pair)?​

Answers

Answer:

Step-by-step explanation:

8x+2y=16

2y=-8x+16

y=-4x+8

slope is -4

y-intercept is (0,8)

x-intercept is (2,0)

Answer:

slope = -4

y-intercept = (0,8)

x-intercept = (2,0)

Step-by-step explanation:

To find the slope:

8x + 2y = 16. First get the y by itself.

2y = -8x + 16. Then divide by 2

y = -4x + 8. So the slope is -4.

y-intercept:

8x+2y=16

8(0)+2y=16

2y=16

y=8

y-int: (0,8)

x-intercept:

8x+2y=16

8x+2(0)=16

8x=16

x=2

x-int: (2,0)

Simplify 6^7/6^5

I have no idea math is hard

Answers

Step-by-step explanation:

hi hlo hshsvbzbzbsbbzbsbsbsb

Answer:

It is 36

Step-by-step explanation:

In a survey, 32% of the people chose pizza as their favorite food. The results were reported to within 2% accuracy. What is the maximum and minimum percent of people who chose pizza? Show work

Answers

Answer:

okogfyuijsudiwgsydjhdbdjwnwbwv

Apples are $1.99per pound you need 3 1/4 pound to make apple crisp how much will you spend on apples in total

Answers

Answer:

1.99/1 pound = x/3.25 pound  (3 1/4 =3.25)

Cross multiply

X=(1.99)(3.25)=$6.47

Step-by-step explanation:

Math Please Help Make sure you explain your answer Thanks Have a blessed day!!

Answers

Answer:

Option B: x = 15 is a solution, but x = 9 is not is the correct answer.

Step-by-step explanation:

Given equation is:

x - 3 = 12

The solutions we have to check are;

x = 9 and x = 15

Putting x = 9 in the given equation;

9 - 3 = 12

6 ≠ 12

Putting x = 15 in the given equation;

15 - 3 = 12

12 = 12

Hence,

Option B: x = 15 is a solution, but x = 9 is not is the correct answer.

HELP ASAP PLEASE!!!!!!

Answers

Answer:

Purple: [tex]\sf{x=28.8}[/tex]

Blue: [tex]\sf{x=4}[/tex]

Yellow: [tex]\sf{x=-8}[/tex]

Green: [tex]\sf{x=-5.2}[/tex]

Solution Steps:

______________________________

1.) [tex]\bold{\frac{x}{-7.2}=-4}[/tex]:

- Multiply both sides by −7.2:

[tex]-7.2[/tex] × [tex]-7.2=[/tex] Cancels Out[tex]-4[/tex] × [tex]-7.2=28.8[/tex]

So your answer is [tex]\bold{x=28.8}[/tex].

2.) [tex]\bold{\frac{3}{2}x=6}[/tex]:

- Find the reciprocal and multiply by that on each side:

The reciprocal is [tex]\frac{2}{3},(3*2=6,~2*3=6)[/tex][tex]\frac{3}{2}[/tex] turns into [tex]\frac{2}{3}[/tex][tex]6[/tex] × [tex]\frac{2}{3}=\frac{12}{3}[/tex]

- Divide the numerator by the denominator:

[tex]12[/tex] ÷ [tex]3=4[/tex]

So your answer is [tex]\bold{x=4}[/tex].

3.) [tex]\bold{\frac{x}{2}=-4}[/tex]:

- Multiply both sides by 2:

[tex]\frac{x}{2}[/tex] × [tex]2=x[/tex][tex]-4[/tex] × [tex]2=-8[/tex]

So your answer is [tex]\bold{x=-8}[/tex].

4.) [tex]\bold{-5x=26}[/tex]:

- Divide both sides by −5:

[tex]-5x[/tex] ÷ [tex]-5=x[/tex][tex]26[/tex] ÷ [tex]-5=-5.2[/tex]

So your answer is [tex]\bold{x=-5.2}[/tex].

______________________________

75
What is the decimal form of ?
10
0.75
7.5
70.5
75.0

Answers

75 % decimal form is 0.75, just divide it by 100

help me factorise this number
16p⁴ -q⁴​

Answers

Answer:

(4p²+q²)(2p+q)(2p-q)

Step-by-step explanation:

16p⁴ -q⁴

(4p²)²-(q²)²

(4p²+q²)(4p²-q²)

(4p²+q²)(2p+q)(2p-q)

Choose the two rectangular prisms that have a volume of 36cm^3?

Answers

Answer:

Correct choices: B, D

Step-by-step explanation:

The Volume of a Rectangular Prism

Given a rectangular prism of dimension W, L, and H, the volume is calculated as:

V = WLH

Each small cube of the figure has a volume of 1 cube centimeter. We need to calculate the volume of each solid and determine which ones have a volume of 36 cube cm.

A: V = 5*3*4 = 60 cube cm

B: V = 3*3*4 = 36 cube cm

C: V = 3*4*2 = 24 cube cm

D: V = 6*2*3 = 36 cube cm

E: V = 2*4*2 = 16 cube cm

Correct choices: B, D

Determine if the triangles are congruent. If yes, by which theorem?
Ono
yes, SSS
yes, SAS
yes, ASA
yes, AAS
O yes, HL

Answers

I’m pretty sure it’s “yes, SSS”. Since the triangle are congruent, and the little ticks indicate “side”.

PLZ HELP URGENT. Select the true statement about the triangles pictured below.

Answers

Answer is D. JL > MO

Simplify the expression 54a8b2/6а-4b5

Answers

Answer: 27a8b2/3a-2b5

Step-by-step explanation:

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