The tunnel measures 225 meters in length.
Uniform velocity: What is it?
Velocity is the measure of how quickly an object's position changes over time and in relation to a frame of reference. A body moves across space with uniform velocity when it does so with an equal displacement per unit of time.
Velocity is equal to the product of distance and time.
It measures in m/s.
In response to the query, we are provided with the-
150m is the length of the train.
s m is the tunnel's length.
90 km/hr is the train's speed.
= 90 × 5/18 m/sec
= 25m/sec
Total distance equals (train length plus tunnel length).
[tex]Speed = \frac{Distance}{Time}[/tex]
⇒ 25 = (150 + s) / 15
⇒ 25 × 15 = 150 +s
⇒ 375 = 150 + s
⇒ 375 - 150 = s
⇒ s = 225
⇒ s = 225m
Hence, the length of the tunnel is 225 m.
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Given m∥n, find the value of x. 34°.
Answer: 34
Step-by-step explanation:
Vertical angles are congruent.
rewrite this expression as an addition equation -4 3/8 - (-1 1/4)=
Given the equation:
[tex]\text{ - 4 }\frac{3}{8}\text{ - (-1 }\frac{1}{4})[/tex]May you guys/girls please help me I have to submit this before midnight and I do not fail because my parents will get me , so may y'all please help me out!?
Answer:
Answer down below!
Step-by-step explanation:
Let's try and find a point that we can easily start on (a point that lands perfectly on the graph)
The point that we will use is (2,2)
So, starting from there we use rise/run to get our answer
We go up 1 and over -2
So, our slope will be (since we cannot simply it...)
-1/2
Hello!
To find the slope:
==> need to pick two points on the line
(x₁, y₁): (0,3)
(x₂,y₂): (4,1)
[tex]Slope = \dfrac{y_2-y_1}{x_2-x_1} =\dfrac{1-3}{4-0} =\dfrac{-2}{4} =-\dfrac{1}{2}[/tex] <== Answer
Hope that helps!
Ava is trying to add together 3/5 and 2/9
Her first step is to rewrite the fractions using their lowest common denominator.
What denominator should she use?
Explanation:
The LCM of 5 and 9 is 5*9 = 45
This is the LCD of the two fractions.
3/5 = 27/45 after multiplying top and bottom by 92/9 = 10/45 after multiplying top and bottom by 5So,
3/5 + 2/9 = 27/45 + 10/45 = 37/45
The figure shows rectangle RSTW. Which of the following conditions satisfies the criteria for rectangles?
a. m∠SRZ = 40°
b. m∠STZ = 40°
c. m∠SRW = 80°
c. m∠TWR = 80°
For the given rectangle RSTW, the condition satisfies the criteria of rectangles is equal to m ∠SRZ = 40°.
As given in the question,
In the given figure of rectangle RSTW,
Conditions satisfies the criteria of the rectangles are as follow:
a. m ∠SRZ = 40°
Line segment SR is parallel to TW. TR is the transversal.
m ∠SRT = m ∠WTR ( Alternate interior angles)
T -Z - R
m ∠SRZ = m ∠WTZ = 40°
Given criteria is satisfies the criteria of rectangles.
b. m ∠STZ = 40°
All the interior angles of rectangle are of measure 90°
m ∠STW = 90°
m ∠WTZ = 40° (given)
m ∠STZ + m ∠WTZ = 90°
⇒ m ∠STZ = 50°
Given option does not satisfies the criteria of rectangles.
c. m ∠SRW = 80°
All the interior angles of rectangle are of measure 90°
Given option does not satisfies the criteria of rectangles.
d. m ∠TWR = 80°
All the interior angles of rectangle are of measure 90°
Given option does not satisfies the criteria of rectangles.
Therefore, for the given rectangle RSTW, the condition satisfies the criteria of rectangles is equal to m ∠SRZ = 40°.
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1) [tex]\frac{2x-3}{3} +\frac{x-1}{5}[/tex]
Answer:
4_62
Step-by-step explanation:
its is just leave me
4 is 50% of what number?
Answer:
8
Step-by-step explanation:
To solve this problem you multiply 4 by 100 and then divide the total by 50 as follows: (4 x 100) / 50
In the diagram, M is the midpoint of AB.
Support the following argument for AM = MB by
writing the reason that validates each statement.
A. Definition of midpoint
B. Definition of congruent segments
C. Given information
We know that M is the midpoint of AB.
This means that AM = MB.
Therefore, AM=~MB.
Answer:
It goes
1.) C
2.) A
3.) B
8. Give the slope of y + 2 = 3(x-7) and a point on the line.
a. The slope is 3 and (-7, 2) is on the line.
b. The slope is 3 and (7, -2) is on the line.
c. The slope is 2 and (7, 3) is on the line.
d. The slope is 7 and (3, 2) is on the line.
9. What is the point-slope equation of the line containing the points (3, 3) and
(6,5)?
a. y - 3=(x-3)
b. y 3 = (x + 3)
c. y + 3 =(x-3)
d. y + 3 = 3(x - 2)
10. The slope of a given line is 3. The line that is parallel to it has a slope of:
a. -3
b. ½
C. -1
d. 3
11. The slope of a given line is 4. The line that is perpendicular to it has a slope of:
a. -4
b. -
C. 4
Answer: b c
Step-by-step explanation:
Click on the graph to choose the correct answer to the equation. y ≥ 2 x + 1
The graph of the linear inequality can be seen in the image at the end.
How to identify the graph of the inequality?
Here we have the linear inequality:
y ≥ 2x + 1
To graph this, we first need to graph the line.
y = 2x + 1
With a solid line, because we have the symbol ≥, which means that the points on the line are solutions.
Once we graphed that line, we look at our inequality:
y ≥ 2x + 1
It says that y is larger than or equal to the values on the line, so once the line is graphed we need to shade all the region above that line.
The shaded region (and the line itself) represent all the solutions of the linear inequality.
And the graph can be seen below.
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Consider the first 2 terms of the sequence 28, 14, ...
Determine whether the sequence is arithmetic or geometric. Explain your reasoning.
please help me with 1 and 2
1. The given sequence 28, 14 ..... will be either arithmetic or geometric sequence.
2. The common difference of the sequence 28, 14 ..... will be;
d = - 14
And, Next three terms of the arithmetic sequence are;
0, -14, -28
What is Geometric sequence?
An sequence has the ratio of every two successive terms is a constant, is called a Geometric sequence.
Given that;
The first two terms of the sequence,
28, 14 .....
Now,
Let the sequence is in arithmetic sequence, then;
28, 14 ......
The common difference of the sequence is;
d = 14 - 28
d = - 14
And, Let the sequence is in geometric sequence, then;
28, 14 ......
The common difference of the sequence is;
d = 14/28
d = 1/2
Thus, The given sequence 28, 14 ..... will be either arithmetic or geometric sequence.
2. If the given sequence is in arithmetic sequence, then;
28, 14 ......
The common difference of the sequence is;
d = 14 - 28
d = - 14
And, The nth term of the arithmetic sequence is;
⇒ [tex]a_{n} = a + (n - 1)d[/tex]
Where, 'a' is the first term and 'd' is the common difference of the sequence.
So, The 3rd term of the arithmetic sequence is,
⇒ [tex]a_{n} = a + (n - 1)d[/tex]
[tex]a_{3} = 28 + (3-1)(-14)\\ \\a_{3} = 28 - 2 * 14\\\\a_{3} = 28 - 28\\\\a_{3} = 0[/tex]
And, The 4th term of the arithmetic sequence is,
[tex]a_{4} = 28 + (4-1)(-14)\\ \\a_{4} = 28 - 3 * 14\\\\a_{4} = 28 - 42\\\\a_{4} = -14[/tex]
And, The 5th term of the arithmetic sequence is,
[tex]a_{5} = 28 + (5-1)(-14)\\ \\a_{5} = 28 - 4 * 14\\\\a_{4} = 28 - 56\\\\a_{5} = -28[/tex]
Therefore, Next three terms of the arithmetic sequence are;
⇒ 0, -14, -28
Thus,
1. The given sequence 28, 14 ..... will be either arithmetic or geometric sequence.
2. The common difference of the sequence 28, 14 ..... will be;
d = - 14
And, Next three terms of the arithmetic sequence are;
0, -14, -28
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whats the equation for X 3?
we need to verify for each equation if x=3 is a solution. If we replace x by 3 in the first equation we get
[tex]\begin{gathered} 9\cdot3-7=20 \\ 27-7=20 \\ 20=20 \end{gathered}[/tex]so the answer is letter A
11. Find all missing angles
The angle ∠1=62° ,∠2=71° ,∠3=109° ,∠4=35° ,∠5=109° ,∠6=29° ,∠7=47° and ∠8=62° for the given quadrilateral by using different laws for angle and lines.
What is quadrilateral?A polygon with four sides, four angles, and four vertices is called a quadrilateral. The Latin words quadri, which means four, and latus, which means side, were combined to create the English word quadrilateral.
What is polygon?A polygon is a two-dimensional, closed shape that is flat or plane and is bounded by straight sides. Its sides are not curved. A polygon's edges are another name for its sides. The vertices (or corners) of a polygon are the places where two sides converge.
∠1=62° by parallel line properties.
∠2=71° by alternate angles.
∠3=109° by alternate angles
∠4=35° by triangle properties
∠5=109° by alternate angles
∠6=29° by triangle properties
∠7=47° by parallel line properties.
∠8=62° by parallel line properties.
for the given quadrilateral by using different laws for angle and lines, The angles are ∠1=62° ,∠2=71° ,∠3=109° ,∠4=35° ,∠5=109° ,∠6=29° ,∠7=47° and ∠8=62°.
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the number of cars produced when x x dollars is spent on labor and y y dollars is spent on capital invested by a manufacturer can be modeled by the equation 45 x 1 3 y 2 3
The formula in terms of x and y for dy/dx is y/ -2x
The value of dy/dx at the point (1,1) is -0.5
The question is incomplete, the full question is given below:
200 cars can produced when x dollars is spent on labor and y dollars is spent on capital. the equation that relates x and y is 45 x^1/3 y^2/3= 200
a. Find a formula in terms of x and y for dy/dx
b. Find the value of dy/dx at the point (1,1). Round your answer to 4 decimal places
Part a
A formula in terms of x and y for dy/dx
We differentiate equation that relates x and y with respect to x by implicit differentiation:
=d/dx(45 x^1/3 y^2/3) =d/dx( 200)
=> 45 *(1/3) x^-2/3 y^2/3 + 45 x^1/3 2/3 y^ -1/3 dy/dx=0
=> x^-2/3y^2/3+ 2 x^1/3 y^-1/3 dy/dx=0
=> y/x= -2dy/dx
=> log y = -2 log x +log c
=> y= x^ -2 +c
putting x=y=1
c=0
then y= 1/x^2
b) y/x= -2dy/dx
put x=y=1 we get
-1/2 = dy/dx
dy/dx =-0.5
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how dose parallelogram work
Answer:
Parallelograms are shapes with 2 pairs of parallel sides, like a square or a rhombus. Parallel means lines on a shape that never touches.
Step-by-step explanation:
Hope this helps!
P.S, brainliest? Thanks!
Maria paid $240 for a table set after a discount of 40%. What was the original price? Use scratch paper to create a model to help solve the problem (e.g., tape diagram, table, double number line diagram, 10×10 grid).
The original price was $
Answer:
$400
Step-by-step explanation:
We see that the discount price is (100-40) = 60% of the original price
If 60% corresponds to $240, than 10% corresponds to 240/6 = $40
Since the original price is 100% = 10*10%, the original price is 10* $40 = 400.
I can't make something with scratch paper right now, i hope you will be able yourself to put the above information is a table :-)
Good luck with it!
Marissa buys a rare gem priced at $82.00. The sales tax rate is 7.9%.
What is the tax amount to the nearest cent?
label required
The tax amount to the nearest cent:$6.478
What is Tax?
Tax is the sum of money that citizens hand up to the government in exchange for goods and services. A taxpayer and a tax collector are both partners in any tax transaction. An entity that pays taxes to the government is referred to as a taxpayer. Any middleman that collects taxes on the government's behalf, including the government, is a tax collector.
Given,
The price of Rare gem = $82.00
The sales tax = 7.9%
Converting percent into decimal
7.9 / 100 = 0.079
The amount of sales tax = 82 x 0.079
= $6.478
The Total amount of the gem before the sales tax:
82 - 6.478 = $75.522
Hence, The tax amount to the nearest cent is $6.478
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Tasha earns $400 per week plus a commission of 10% on her weekly sales. Each week she saves One-fourth of her earnings. In the expression , what does the expression 400 + 0.1s represent in this situation?
The expression 400 + 0.1s represents her total weekly earnings.
What is an expression?An expression is written in the form of variables and constants separated by the operation of addition and subtraction. There are many types of expressions some of them are algebraic expression, trigonometric expression, logarithmic expressions, and many more.
Given Tasha earns $400 per week plus a commission of 10% on her weekly sales.
She also saves one-fourth of her earnings.
Assuming the amount she makes on sales is s.
∴ The expression that represents her total weekly earnings is,
= 400 + 0.1s.
As 10% in decimal can be written as (10/100) = 0.1.
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Rectangle 1 has an area on 60.81 square centimeters. Rectangle 2 has an area of 61.44 square centimeters. Rectangle 3 has an area of 35.52 square centimeters. Rectangle 4 has an area of 47.88 square centimeters. Part A “which two rectangles have the greatest difference in area?” Part B “Look at your answer to part A. What is the difference between those two rectangles areas?”
The most appropriate choice for area of rectangle will be given by-
Difference between area of rectangle 2 and area of rectangle 3 is the largest.
Difference is 25.92 [tex]cm^2[/tex]
What is area of rectangle?
Area of rectangle is the total space taken by the rectangle.
If l is the length of the rectangle and b is the breadth of the rectangle, then area of rectangle is given by
Area of rectangle = [tex]l \times b[/tex]
Here,
Area of rectangle 1 = 60.81 [tex]cm^2[/tex]
Area of rectangle 2 = 61.44 [tex]cm^2[/tex]
Area of rectangle 3 = 35.52 [tex]cm^2[/tex]
Area of rectangle 4 = 47.88 [tex]cm^2[/tex]
Difference between Area of rectangle 1 and rectangle 2 =
(61.44 - 60.81)[tex]cm^2[/tex]
= 0.63 [tex]cm^2[/tex]
Difference between Area of rectangle 1 and rectangle 3 =
(60.81 - 35.52)[tex]cm^2[/tex]
= 25.29 [tex]cm^2[/tex]
Difference between Area of rectangle 1 and rectangle 4 =
(60.81 - 47.88)[tex]cm^2[/tex]
= 12.93 [tex]cm^2[/tex]
Difference between Area of rectangle 2 and rectangle 3 =
(61.44 - 35.52)[tex]cm^2[/tex]
= 25.92 [tex]cm^2[/tex]
Difference between Area of rectangle 2 and rectangle 4 =
(61.44 - 47.88) [tex]cm^2[/tex]
= 13.56 [tex]cm^2[/tex]
Difference between Area of rectangle 3 and rectangle 4 =
(47.88 - 35.52) [tex]cm^2[/tex]
= 12.36 [tex]cm^2[/tex]
Difference between area of rectangle 2 and area of rectangle 3 is the largest.
Difference is 25.92 [tex]cm^2[/tex]
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Karyn proofreads 15 pages in 2 hours for $40. What is her proofreading rate in pages per hour? How much does she earn per hour?
The proofreading rate will be ( 7.5 pages/ hour) and the cost per hour will be $20.
What is an expression?The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.
Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.
Given that Karyn proofreads 15 pages in 2 hours for $40. The rate will be calculated as:-
Rate of reading = ( 15 / 2 )
Rate of reading = ( 7.5 ) pages per hour
The cost will be calculated as:-
For 2 hours = $40
For 1 hour = ( 40 / 2 )
For 1 hour = $20
Therefore, the proofreading rate will be ( 7.5 pages/ hour) and the cost per hour will be $20.
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Write a quadratic equation in the form x^2+bx+c=0
ax^2 + bx + c = 0
a=1
b=4
c=-8
x^2 + 4x - 8 = 0
(I thought I was wrong but I might be correct lol)
(root 10 - root 2 )^2
not that bad
goodluck tho :)
Renz wishes to make an open box froma square piece of cardboard with a sidethat measures 15 inches by cuttingequal squares from the four cornersand folding the sides. what will be thevolume of the box if he cuts a squarewith 2 inch sides?
2.5 inches will be the volume of the box if he cuts a square with 2 inch sides.
What is volume ?
Every three-dimensional item takes up space in some way. The volume of this area is what is being measured. The area contained by an object's limits in three-dimensional space is referred to as its volume. It is sometimes referred to as the object's capacity.Let each side of he square that's cut-off from each corner be represented by x.
This means that the base of the box will be of dimension of the side 15−2x while the height of the box will be x.
Thus;
Volume of box is:
V = (15 − 2x)(15 − 2x)x
V = (15 − 2x)²x
V = (4x² - 60x + 225)x
V = 4x³ - 60x² + 225x
Let's differentiate with respect to x to get;
dV/dx = 12x² - 120x + 225
Maximum value of x is at dV/dx = 0
12x² - 120x + 225 = 0
Using quadratic formula, we arrive at;
x = 2.5 or 7.5
Now, let's find the second derivative of the volume;
d²V/dx² = 24x - 120
Putting x = 2.5 gives;
d²V/dx² = 24(2.5) - 120
d²V/dx² = -60Thus, V is maximum at x = 2.5, since d²V/dx² is negative
At x = 7.5;
d²V/dx² = 24(7.5) - 120
d²V/dx² = 60
Thus, V is minimum at x = 7.5, since d²V/dx² is negative
Thus,we will use x = 2.5
Maximum volume; V = (15 − 2(2.5))(15 − 2(2.5))(2.5)
V = 10 × 10 × 2.5
V = 250 Sq.inches
Dimensions are;
(15 − 2x) = 15 - 2(2.5) = 10 inches
(15 − 2x) = 15 - 2(2.5) = 10 inches
x = 2.5 inches
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How many units is 523 from 0?
Using proportions, it is found that the number 523 is 523 units from zero.
What is a proportion?A proportion is a fraction of a total amount, and equations can be built to find the desired measures in the context of the problem using arithmetic operations such as multiplication and division with the unit rates of the measures.
One example of application is for the digit values of a number, as:
Each unit is worth 1.Each tenth is worth 10.Each hundredth is worth 100.Each thousandth is worth 1000.And so on...
For the number 523 given in this problem, since each unit is worth one, the number of units that it is away from zero is given by:
523/1 = 523 units.
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work out the length of x
Answer:Tes icahd
Step-by-step explanation:
Consider the population of a small town that grows according to the explicit rule: p = 53600 + 145 n, where n is the number of years after 2009. based on this model what is the population in 2022?
Answer:
p = 55485
Step-by-step explanation:
p = 53600 + 145 n
n = 2022 - 2009 = 13 years
so, p = 53600 + 145(13)
p = 55485
can someone pls help? thx i appreciate it :)
The scale factor from the ΔABC to ΔDEF is 3/2 cm.
Given that, in triangle ABC, side AB measures 12 cm and is the longest side and in triangle DEF, side DE measures 8 cm and is the longest side.
What is the scale factor?To adjust the size of a figure without altering its shape, a scale factor is a number or conversion factor that is utilized.
The fundamental equation to determine a figure's scale factor is written as, Scale factor is equal to the difference between the dimensions of the new and old shapes.
The scale factor from the triangle ABC to triangle DEF is 12/8 = 3/2 cm
The scale factor from the triangle DEF to triangle ABC is 8/12 = 2/3 cm
Therefore, the scale factor from the ΔABC to ΔDEF is 3/2 cm.
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Danae is choosing between two jobs. One job pays an annual bonus of $1,500 plus $120 per day worked. The second job pays an annual bonus of $2,500 plus $110 per day worked. Which equation can be solved to determine after how many days, d, Danae would make the same amount of money regardless of the job she chooses?
a.) 120d + 110d = 1,500 + 2,500
b.) 120 + 110 = 1,500d + 2,500d
c.) 120d + 1,500 = 110d + 2,500
d.) 120d + 2,500 = 110d + 1,500
The equation that can be solved to determine the number of days when both jobs would have the same cost is 120d + 1,500 = 110d + 2,500.
What is the equation?The equations that would be formed would be linear equations. A linear equation is an equation that has a single variable that is raised to the power of one. A linear equation is a straight line when it is drawn on a graph.
The equation that represents the total bonus of the first job is: fixed pay + total variable pay
1,500 +( $120 x d)
1,500 + 120d
The equation that represents the total bonus of the second job is: fixed pay + total variable pay
$2,500 + ($110 x d)
$2,500 + $110d
When the amount at both jobs are equal, the two above linear functions would be equal
$2,500 + $110d = 1,500 + 120d
Combine similar terms together:
$2,500 - $1,500 = $120d - $110d
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help me please can you solve this for meh
Answer: 6w^3-3+18u^2
Step-by-step explanation:
suppose the time to process a loan application follows a uniform distribution over the range 8 to 17 days. what is the probability that a randomly sel
Answer:
0.2
Step-by-step explanation: