Of 57 cars making up a freight train, 23 are boxcar. What fraction of the cars are not boxcars?

Answers

Answer 1
The number of non box cars is the number of cars minus the number of boxcars.
This is 57 cars - 23 boxcars = 34 non boxcars

The fraction is the number of nonboxcars divided by the total cars
or
34/57
Answer 2

Answer:

total no of cars =57

Cars which are not boxcars =57-23=34

23/34×57=1339/34


Related Questions

What is the relative size of (how many times as large) a circle's' circumference C to its diameter, d

Answers

Answer:

The circumference is pi times larger than the diameter of a circle.

Step-by-step explanation:

The formula of the circumference of a circle is

C = 2(pi)r = (pi)d

C = (pi)d

To find the ratio of the circumference to the diameter, divide both sides of the equation by d.

C/d = pi

The circumference is pi times larger than the diameter of a circle.

2.5 8.7 *** 9.6 4.6 *** 5.1 9.9 *** 10.0 6.0 10.3 *** 10.5 6.5 *** 6.6 11.6 8.5 12.0
Consider the sample of n = 20 scores. Notice that they are listed in order from 2.5 to 12.0,
but that some of the scores are obscured by ***. The mean, M, of these scores is 8.0. Suppose you are asked for the sample standard deviation of these scores. Since you don't have all of them, you cannot calculate it. Which of the following is the best estimate of the sample standard deviation?
a. 9.5
b. 0.5
c. 6.4
d. 2.7

Answers

Answer:

D. 2.7

Step-by-step explanation:

Given

[tex]Mean = 8.0[/tex]

[tex]n = 20[/tex]

[tex]Range = 2.5\ to\ 12.0[/tex]

Required

Estimate the standard deviation

Since, the given data has incomplete parameters, we can apply the range rule to estimate the standard deviation;

This is done as follows;

[tex]S.D = \frac{1}{4}(Max - Min)[/tex]

In this case:

[tex]Max = 12.0[/tex]

[tex]Min = 2.5[/tex]

So:

[tex]S.D = \frac{1}{4}(Max - Min)[/tex]

[tex]S.D = \frac{1}{4}(12.0 - 2.5)[/tex]

[tex]S.D = \frac{1}{4}(9.5)[/tex]

[tex]S.D = 2.375[/tex]

From the list of given option, the closest to 2.375 is 2.7;

Hence, the best estimate is 2.7

The correct option is D. 2.7

Given that,

The mean is 8.0.the n = 20.The range is from 2.5 to 12.0

The calculation is as follows:

The standard deviation should be

[tex]= \frac{1}{4} (12 - 2.5)\\\\ = \frac{1}{4} (9.5)[/tex]

= 2.375

= 2.7

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Need help with this question

Answers

Answer:

i cant see it

Step-by-step explanation:

umm

The scale of a map is 1 in = 11.9 miles. How many inches will be drawn on the map to represent 30.9 miles?​

Answers

Answer:

  2.60 inches

Step-by-step explanation:

Map and actual distances are proportional. So the map distance m for 30.9 miles will be related to the actual distance in the same way the scale is:

  m/30.9 = 1/11.9

  m = 30.9/11.9 ≈ 2.5967

The length on the map is about 2.60 inches.

Evaluate the expression and write your answer in the form a + bi. 1) (2-6i)+(4+2i)2) (6+5i)(9-2i)3) 2/(3-9i)4) (3 − 5i)(7 − 2i)

Answers

Answer:

Step-by-step explanation:

Given the following complex numbers, we are to expressed them in the form of a+bi where a is the real part and b is the imaginary part of the complex number.

1) (2-6i)+(4+2i)

open the parenthesis

= 2-6i+4+2i

collect like terms

= 2+4-6i+2i

= 6-4i

2)  (6+5i)(9-2i)

= 6(9)-6(2i)+9(5i)-5i(2i)

= 54-12i+45i-10i²

= 54+33i-10i²

In complex number i² = -1

= 54+33i-10(-1)

= 54+33i+10

= 54+10+33i

= 64+33i

3) For the complex number 2/(3-9i), we will rationalize by multiplying by the conjugate of the denominator i.e 3+9i

= 2/3-9i*3+9i/3+9i

=2(3+9i)/(3-9i)(3+9i)

= 6+18i/9-27i+27i-81i²

= 6+18i/9-81(-1)

= 6+18i/9+81

= 6+18i/90

= 6/90 + 18i/90

= 1/15+1/5 i

4) For (3 − 5i)(7 − 2i)

open the parenthesis

= 3(7)-3(2i)-7(5i)-5i(-2i)

= 21-6i-35i+10i²

= 21-6i-35i+10(-1)

= 21-41i-10

= 11-41i

  Simplified form of the given expressions will be,

1). 6 - 4i

2). 64 + 33i

3). [tex]\frac{1}{15}+\frac{1}{5}i[/tex]

4). [tex]\frac{31}{53}-\frac{31}{53}i[/tex]

1). In a complex number (a + bi),

    a = Real part of the complex number

   bi = Imaginary part

     Expression given in the question → (2 - 6i) + (4 + 2i)

Rule to solve the given expression,

"Add real part and imaginary part of two complex numbers separately"

(2 - 6i) + (4 + 2i) = (2 + 4) + (-6i + 2i)

                         = 6 + (-4i)

                         = 6 - 4i

  Therefore, simplified form of the given expression will be (6 - 4i).

2). Given expression → (6 + 5i)(9 - 2i)

Rule to solve the expression → i² = -1

(6 + 5i)(9 - 2i) = 6(9 - 2i) + 5i(9 - 2i)

                       = 54 - 12i + 45i - 10i²

                       = 54 - 12i + 45i + 10 [Since, i² = -1]

                       = (54 + 10) + (45i - 12i)

                       = 64 + 33i

     Therefore, simplified form of the given expression will be (64 + 33i).

3). Given expression → [tex]\frac{2}{3-9i}[/tex]

Multiply numerator and denominator with the conjugate of (3 - 9i) to convert the expression into (a + bi).

[tex]\frac{2}{3-9i}= \frac{2(3+9i)}{(3-9i)(3+9i)}[/tex]

       [tex]=\frac{2(3+9i)}{3^2-(9i)^2}[/tex]

       [tex]=\frac{6+18i}{9-81(-1)}[/tex]

       [tex]=\frac{6+18i}{9+81}[/tex]

       [tex]=\frac{6+18i}{90}[/tex]

       [tex]=\frac{6(1+3i)}{90}[/tex]

       [tex]=\frac{1}{15}+\frac{1}{5}i[/tex]

    Therefore, simplified form of the given expression will be [tex]\frac{1}{15}+\frac{1}{5}i[/tex]

4). Given expression → [tex]\frac{(3-5i)}{(7-2i)}[/tex]

Multiply numerator and denominator with the conjugate of the denominator.

[tex]\frac{(3-5i)}{(7-2i)}=\frac{(3-5i)(7+2i)}{(7-2i)(7+2i)}[/tex]

         [tex]=\frac{3(7+2i)-5i(7+2i)}{7^2-(2i)^2}[/tex]

         [tex]=\frac{21+4i-35i-10i^2}{49-4(-1)}[/tex]

         [tex]=\frac{21-31i+10}{53}[/tex]

         [tex]=\frac{31-31i}{53}[/tex]

         [tex]=\frac{31}{53}-\frac{31}{53}i[/tex]

  Therefore, simplified form of the given expression will be [tex]\frac{31}{53}-\frac{31}{53}i[/tex].

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Sonia wants to sew ribbon along each side of a square pillow if the pillow has an area of 144 in² how much ribbon must she by to have the exact amount that she needs

Answers

Answer:

12 in

Step-by-step explanation:

she has square pillow, so 12*12=144 sq in

write the number 3/100 as a decimal.

Answers

Answer:

Step-by-step explanation

0.03.

What is another way to name line l?

Answers

Answer:

Line UM.

Step-by-step explanation: you can name a line by naming at least two points on it.

Line l can be called line UM, line LM, and line UL because line l is contained in plane S.

What is a straight line?

A straight line is a combination of endless points joined on both sides of the point.

The slope 'm' of any straight line is given by:

[tex]\rm m =\dfrac{y_2-y_1}{x_2-x_1}[/tex]

m is the ratio of the line,

The ratio that y increase as x increases is the slope of a line. The slope of a line reflects how steep it is, but how much y increases as x increases.

It is given that:

A plane S contains a line l.

It is possible to give a name for line l in different ways.

The line l can be called:

Line UMLine LMLine UL

Lines that intersect at a right angle are named perpendicular lines. Lines that are always the same distance apart from each other are known as parallel lines.

Thus, line l can be called line UM, line LM, and line UL because line l is contained in plane S.

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Sin(x)=x- x3/3!+x5/5!-x7/7!+....The percentage relative approximate error in using three terms to find sin(4.1) is ______percent.

Answers

Answer:

The answer is "239.62%".

Step-by-step explanation:

Given value:

[tex]\bold{\sin(x)=x- \frac{x^3}{3!}+\frac{x^5}{5!} - \frac{x^7}{7!}+....}[/tex]

Solve the first three values:

[tex]\sin(x)=x- \frac{x^3}{3!}+\frac{x^5}{5!}[/tex]

put the value of sin(4.1):

[tex]\to \sin(4.1)=(4.1)- \frac{(4.1)^3}{3!}+\frac{(4.1)^5}{5!} \\\\[/tex]

                 [tex]=(4.1)- \frac{(4.1)^3}{3!}+\frac{(4.1)^5}{5!} \\\\=(4.1)- \frac{68.92}{3 \times 2\times 1}+\frac{1158.56}{5\times 4 \times 3 \times 2 \times 1}\\\\[/tex]

                 [tex]=(4.1)- 11.48+9.65\\\\= 2.27[/tex]

The actual value of [tex]\sin(4.1) = -1.59[/tex]

Calculating the percentage relative approximate error value:

Formula:

[tex]=\frac{actual \ value - \ approx \ value }{actual \ value} \times 100\\\\[/tex]

[tex]=\frac{-1.59 - 2.27 }{-1.59} \times 100\\\\= \frac{-3.81}{-1.59} \times 100\\\\= \frac{3.81}{1.59} \times 100\\\\=239.62 \ \%[/tex]

Give EG = 5x+7 EF =5x and FG=2x-7

Answers

Answer:

x = 7

42, 35, 7

Step-by-step explanation:

EG = 5x+7 EF = 5x  FG = 2x-7

Point F is on line segment of EG, therefore EG = EF + FG

5x + 7 = 5x + 2x - 72x = 14x = 7

Then

EG = 5*7 + 7 = 42EF = 5*7 = 35FG = 2*7 - 7 = 7

how would you solve for 5x=13 for x​

Answers

Answer:

  divide by 5: x = 13/5 = 2.6

Step-by-step explanation:

Make use of the properties of the multiplicative inverse and the multiplication identity element. Multiplying both sides of the equation by the multiplicative inverse of the coefficient of x makes the result be 1x on the left side.

  (1/5)(5x) = (1/5)(13)

  1x = 13/5

The multiplicative identity element (1) does not change the value of what it multiplies, so this simplifies to ...

  x = 13/5

_____

Effectively, we divide (both sides) by 5.

Use the given data to find the minimum sample size required to estimate the population proportion. Margin of error: 0.028; confidence level: 99%; p and q unknownA) 1116B) 2115C) 1939D) 2223

Answers

I think the answer is c or d but I’m not sure tho

Point Tis on line segment SU. Given TU = 4x + 1, SU = 8, and ST = 3x,

determine the numerical length of TU.

Answers

Answer:

5 units

Step-by-step explanation:

If point T is on the line segment SU, then ST + TU = SU.

Given

TU = 4x + 1

SU = 8

ST =  3x

To get TU, we need to get the value of x first. To get x, we will substitute the given parameters into the formula;

3x+4x+1 = 8

7x+1 = 8

subtract 1 from both sides

7x+1-1 = 8-1

7x = 7

divide both sides by 7

7x/7 = 7/7

x = 1

Substitute x = 1 into the length TU

Since TU = 4x+1

TU = 4(1)+1

TU = 5

Hence the numerical length of TU is 5 units

What is the value of x (3x-10)° 149

Answers

Steps to solve:

(3x - 10) = 149

~Add 10 to both sides

3x = 159

~Divide 3 to both sides

x = 53

Best of Luck!

!Need help!

Solve using Substitution Method

2x + 5y = 7
x = 2 - 4y ​

Answers

Answer:

x = 6y = - 1

Step-by-step explanation:

2x + 5y = 7 ......... Equation 1

x = 2 - 4y .......... Equation 2

Substitute x that's equation 2 into equation 1 and solve for y

That's

2( 2 - 4y ) + 5y = 7

4 - 8y + 5y = 7

- 3y + 4 = 7

- 3y = 7 - 4

- 3y = 3

Divide both sides by - 3

y = - 1

Substitute the value of y into equation 1

That's

x = 2 - 4(-1)

x = 2 + 4

x = 6

Therefore the solutions are

x = 6y = - 1

Hope this helps you

gordon drives 220 miles from new york to boston in 4 hours. what is his car's average speed?

Answers

His car’s average speed is 55 mph. The way you find the answer is 220/4 which is equal to 55.

Answer:

55 mph

Because he drives to new york to boston in 4 hours and its 220 miles so 220 is the miles and you divide by the hours so 4 hours so he drove 55 mph

which statement correctly describes the expression

Answers

Answer:

c

Step-by-step explanation:

choice A means

[tex]11 - 2 {m}^{3} [/tex]

choice B means

[tex]2m - 11[/tex]

choice C means which is the answer

[tex] {2m}^{3} - 11[/tex]

choice D means

[tex] {(2m)}^{3} - 11[/tex]

hope it helps ❤❤❤

For any question comment me

When looking at the Cov-19 data globally, it shows that 34 out of 50 (which is 68%) confirmed cases of infected people have recovered already. If that 68% holds true everywhere, answer the following: If a US state had about 56,000 confirmed cases, about how many people should have recovered?​

Answers

Answer:

____________________

68% of 56000 is 38080.

I guess that'd be the amount of people that recovered.

____________________

Negotiating in trade means you are ________

A. coming to an agreement on an item's value
B. discussing how to get to market
C. calculating your total cost
D. exchanging a damaged good

Answers

Quizlet said the answer was A

Negotiating in trade means you are coming to an agreement on an item's value option (A) is correct.

What is negotiation?

The goal of negotiation is to obtain an agreement on one or more contentious issues between two or more parties.

As we know,

On the other hand, trade negotiation is a procedure whereby countries come together to talk about the potential for trade with the aim of arriving at a trade agreement.

When you bargain in trade, you're settling on a price for a product.

Thus, negotiating in trade means you are coming to an agreement on an item's value option (A) is correct.

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If it is an addition problem with different signs what do you do

Answers

Answer:

To add integers with different signs, keep the sign of the number with the largest absolute value and subtract the smallest absolute value from the largest. Subtract an integer by adding its opposite.

plz give brainlist

hope this helped

An angle measuring 32 degrees has a complement that measures (2x - 16)degrees. What is the value of x? (and the steps)

Answers

Answer:

37°

Step-by-step explanation:

32+2x-16=90

2x+16=90

2x=90-16

2x=74

x=37

Give two points with integer coordinates that have a slope of 5/7 between them.

Answers

Answer:

(2,3) and (7,10)

Step-by-step explanation:

Use the slope 5/7 to get to a new point by moving up 5 units and moving to the right 7 units.

If the coordinate point is (x, y) then the coordinate of the other point will be (x + 5, y + 7).

What is coordinate geometry?

Coordinate geometry is the study of geometry using the points in space. Using this, it is possible to find the distance between the points, the dividing line is m:n ratio, finding the mid-point of the line, etc.

The slope is the ratio of the rise or fall and run.

The slope is 5/7. The rise is 5 and the run is 7.

If the coordinate point is (x, y) then the coordinate of the other point will be (x + 5, y + 7).

More about the coordinate geometry link is given below.

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For the function f(x)=-1/3x-2, find the value of x for which f(x)=x.

Answers

Step-by-step explanation:

f(x)=-1/3x-2=x

3x²-2x-1=o

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

x=1/3(or)x=-1

2. What fractional part of the quadrilateral is not shaded? ​

Answers

Answer:

plz show the pic so I can understand

Can u please put a picture or more specific

Write an equation in slope intercept form that is parallel to y = 3x + 4 and goes through the point (-1,5)

Answers

Answer:

Step-by-step explanation:

y - 5 = 3(x + 1)

y - 5 = 3x + 3

y = 3x + 8

answer is C

what is 3.825 as a fraction with a guide?

Answers

Answer:

3 33/40 or 153/40

Step-by-step explanation:

For first answer change the decimal .825 into fraction by making it over 1000. Then Simplify. For the second answer, take the first answer, multiply 3 with 40 and add 33. In the end both answers are equivanlent.

!!!URGENT!!! Read Image Below.

Answers

Answer:

[tex] x = \frac{6 \pm \sqrt{(-6)^2 - 4(3)(8)}}{2(3)} [/tex]

Step-by-step explanation:

Given the equation, [tex] 3x^2 - 6x + 8 = 0 [/tex], the quadratic formula for solving this equation is given as:

[tex] x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} [/tex]

Where,

a = 3

b = -6

c = 8

Plug in the above values into the quadratic formula.

[tex] x = \frac{-(-6) \pm \sqrt{(-6)^2 - 4(3)(8)}}{2(3)} [/tex]

[tex] x = \frac{6 \pm \sqrt{(-6)^2 - 4(3)(8)}}{2(3)} [/tex]

A 6- foot roll of waxed paper costs $3.60. What is the price per inch?

Answers

Step-by-step explanation:

hope this helps

20 cent per inch

Multiply the polynomial expressions below.
(7x + 5)(2x^3 - 4x^2 + 9x - 3)

Answers

Answer:

14x^8-18x^3+43x^2+24x-15

which statement most accurately describes what can happen to jobs in a bad economy​

Answers

What are the statements?

Ansewern

I think you forgot the stament and please add it so i can helpyou out with it.

Step-by-step explanation:

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