Question
Andre calculated the volume of a cylinder. Andre said, “I found the area of a circular cross section and multiplied it by the cylinder’s height.”

Do you agree with Andre's strategy? Explain your reasoning.

Answers

Answer 1

Yes, I agree with Andre's strategy for calculating the volume of a cylinder.

The volume of a cylinder is equal to the area of the base (which is a circle) multiplied by the cylinder's height. This formula is expressed as follows:

Volume = r2h, where r is the radius of the circular base and h is the cylinder's height.

We can use the following formula to calculate the area of the circular base:

Area = r2

So, if we multiply the area of the circular base by the cylinder's height, we get:

Volume = r2h is the formula for calculating the volume of a cylinder.

As a result, Andre's strategy of calculating the volume of a cylinder by finding the area of a circular cross section and multiplying it by the height of the cylinder is valid and correct.

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Related Questions

PLEASE HELP ME ASAP WHAT IS THE VALUE OF X IN THE QUADRILATERAL

Answers

From the sum of the interior angles, it is possible to find x=70°.

Quadrilaterals

There are different quadrilaterals, for example square, rectangle, rhombus, trapezoid, and parallelogram.  Each type is defined accordingly to its length of sides and angles. For example,  in a square, all angles are 90° and all sides present the same value.

The sum of the interior angles of a quadrilateral is equal to 360°.

The question gives a trapezoid and its respective angles. Thus,

x+85+150+55= 360

x+140+150=360

x+290=360

x=360-290

x=70°

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Answer:

b) 70°

Step-by-step explanation:

We know that,

→ The sum of all interior angles in a quadrilateral is 360°.

Now we have to,

→ Find the required value of x.

Forming the equation,

→ 85° + 150° + 55° + x = 360°

Then the value of x will be,

→ 85° + 150° + 55° + x = 360°

→ 290° + x = 360°

→ x = 360° - 290°

→ [ x = 70° ]

Hence, the value of x is 70°.

What specific measure of a geometric figure is shown on the image?

A. A 110° angle
B. A 180 mm side length
C. A 70° angle
D. A 70 mm side length

Answers

Answer:

It is B: A180 mm side length

Solve the system of equations below. Show work.

2x+y=10

3x-y=5

Answers

The solution to the simultaneous equation given is (3, 4)

Solving system of equation

Given the system of equation below

2x+y=10

3x-y=5

From equation 2, the value of y is expressed as:

y = 3x - 5

Substitute the result into equation to have:

2x + 3x - 5 = 10

5x - 5 = 10

5x = 15

x = 3

Since y = 3x - 5

y = 3(3) - 5

y = 4

Hence the solution to the system of equation is (3, 4)

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Does an ice cube with a lower volume melt faster or slower? This is for a math project

Answers

An ice cube with a lower volume will melt faster than an ice cube with a higher volume. This is because there is the less mass and surface area for the heat to transfer through, causing the ice cube to melt at a quicker rate.

For example, imagine two ice cubes, one with a volume of 2 cubic centimeters and another with a volume of 4 cubic centimeters. The ice cube with the lower volume (2 cubic centimeters) will melt faster than the ice cube with the higher volume (4 cubic centimeters) because there is less mass for the heat to transfer through.  In conclusion, an ice cube with a lower volume will melt faster than an ice cube with a higher volume. This is due to the fact that there is the less mass and surface area for the heat to transfer through, causing the ice cube to melt at a quicker rate.

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please help with this

Answers

Answer:

1. S = 20w + 100

2. M = -400w + 3,500

Step-by-step explanation:

1. Since Mateo is starting with a balance of $100, we can set this as our constant term (the 'b' in y = mx + b). Every week, he earns $20, so we can set this as the coefficient on the variable w (which represents how many weeks have passed).

2. Emily is spending money in this situation, so the coefficient on w is negative, as the amount of money she has left is getting smaller. The exact amount that she spends each week is $400, so the negative of that is going to be the coefficient of w in the equation. We can set the constant term in this equation to $3500, as Emily starts with that much money when no weeks have passed (when w = 0).

1. What is the volume of the prism below?
7 cm
3 cm
5 cm
Of a rectangular prism

Answers

The volume of the prism is 105 cm³.

What is Volume?

Volume of a three dimensional shape is the space occupied by the shape.

Given is a rectangular prism.

Volume of a rectangular prism = l × w × h

Here, l is the length, w is the width and h is the height.

Given that,

l = 7 cm, w = 3 cm and h = 5 cm

Substituting,

V = 7 × 3 × 5

   = 105 cm³

Hence the volume of the given rectangular prism is 105 cm³.

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Triangle abc is reflected over the line y = x to produce triangle a'b'c'. What will be the coordinates of a'?.

Answers

The coordinates of A' in triangle A'B'C' which was produced after reflection with condition y =x is equal to option d. ( 1, 2).

Graph is attached.

Triangle A'B'C' is produced after reflection of the triangle ABC over the line y = x.

From the graph we have ,

Coordinates of A is ( 2 , 1)

Coordinates of B is (-1, 4)

Coordinates of C is ( 0, -2)

Condition of reflection of triangle ABC over the line y = x.

x-coordinates replace by y and y replace by x.

Coordinates of triangle A'B'C' are

Coordinates of A' is ( 1, 2)

Coordinates of B' is (4, -1 )

Coordinates of C' is ( -2, 0 )

Therefore, if the coordinates of point A in triangle ABC are (2, 1), the coordinates of point A' in triangle A'B'C' would be option d. (1, 2).

The above question is not complete , the complete question is:

Triangle ABC is reflected over the line y = x to produce triangle A'B'C'. What will be the coordinates of A'? Graph is attached.

a.  (2,−1)            b.  (−2,−1)                 c.  (2,1)                d.  (1,2)

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The measure of an angle is 119.4°. What is the measure of its supplementary angle?

Answers

Answer:

180 - 119.4 = 60.6

So the answer is 60.6

Answer:

60.6°

Step-by-step explanation:

Supplementary angles equal 180 degrees. So we can show this with the following equation:

119.4 + x = 180

where x is the measure of the other supplementary angle.

If we subtract 119.4 from both sides, we get the the value of x, which is 60.6.

What’s this answer
Which equation represents a line that is per

Answers

The equation which is perpendicular to the equation of line passing through the points (-4, 7) (1, 3):

 y = 5/4x + 8.

What is the equation of line?

The equation of a straight line is a relationship between x and y coordinates, The general equation of a straight line is y = mx + c, where m is the slope of the line and c is the y-intercept.

To find the equation of a line that is perpendicular to another line, we need to know the slope of the original line.

The slope of the line passing through (-4,7) and (1,3) is:

m = (3 - 7) / (1 - (-4)) = -4/5

The slope of any line perpendicular to this line would be the negative reciprocal of -4/5, which is 5/4.

Therefore, the equation of a line that is perpendicular to the line passing through (-4,7) and (1,3) would be of the form:

y = 5/4 x + b

where b is the y-intercept.

Among the given options, the equation that matches this form is:

A. y = 5/4 x + 8

So the answer is (A) y = 5/4x + 8.

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Can somebody help with number 8 find the value of each variable using the properties of a Parallelogram

Answers

Answer:

Step-by-step explanation:

your going to have to show anwser choices

Two sides of a triangle have lengths 16 and 17. Which expression describes the length of the third side?

Answers

Answer:

We can use the triangle inequality theorem to determine the possible lengths of the third side of the triangle. According to the theorem, the length of any side of a triangle must be less than the sum of the lengths of the other two sides and greater than the difference of the lengths of the other two sides.

So, for a triangle with sides of length 16 and 17, the length of the third side must satisfy the following inequality:

17 - 16 < third side < 17 + 16

1 < third side < 33

Therefore, the length of the third side must be described by the expression:

1 < third side < 33

Step-by-step explanation:

Solve for x show proofs urgentttt

Answers

The value of the length, x is 5√3

How to determine the value of the length, x

From the question, we have the following parameters that can be used in our computation:

Rise = 11

Length = x

Hypotenuse = 14

The value of the length , x is calculated as

x^2 = Hypotenuse^2 - Rise^2

Substitute the known values in the above equation, so, we have the following representation

x^2 = 14^2 - 11^2

So, we have

x^2 = 75

Take the square root of bpth sides and evaluate

x = 5√3

Hence, the value of x is 5√3

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Acellus
40°
Find the value of x.
X
190°
x= [ ? ]
Enter
Resources
Help

Answers

The value of x for the given circle is 115°.

What is Geometry?

Geometry is a branch of mathematics that deals with the study of shapes, sizes, positions, and properties of objects in space. It includes the study of points, lines, planes, angles, curves, surfaces, and solids.

Using the Angles of Intersecting Chords Theorem,

When two chords cross inside of a circle, the resulting angle's measure is equal to the product of the lengths of the arcs it intercepts and its vertical angle, divided by two.

So, angle x = (190° + 40°)/2  = 115°

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Oliver's Credit Card number has 16 digits. The sum of any three adjacent digits is 13. and the second digit is 2 and the tenth digit is 4.

What are the last three digits of the credit card number?

****IMPORTANT****
Please put steps of solving the question, Thanks!

Answers

The Credit Score is 4274274274274274.

What is Sequence?

A grouping of numbers in a specific order is known as a sequence. On the other hand, a series is described as the accumulation of a sequence's constituent parts.

A phrase is used to describe each number in the series.

Given:

The sum of any three adjacent digits is 13.

The  second digit is 2 and the tenth digit is 4.

So, _2_ _ _ _ _ _ _ 4 _ _ _ _.

Now, the 2nd, 5th, 8th, 11th, 14th digits are equal and so are the 3rd, 6th, 9th, 12th, 15th.

So, the credit card number is 4274274274274274 and the last three digits are 274 which shows the sum is 13.

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A great-uncle has decided to give you a gift of $1,000. Being a financially savvy uncle, before giving you the money, he offers you a choice of the following: You can take the $1,000 today. You can wait five years and be given $1,200 instead 1. How will you decide if the offer presented by your great uncle is to your advantage? 2. Research interest rates for a savings account, checking account, and money market account at different financial institutions. Note the compounding period for each. How much would $1,000 be worth in each account in five years? 3. What are some factors that cause the value of money today to be different from its value in the future?

Answers

1. To decide if the offer presented by your great uncle is to your advantage, you need to consider the time value of money. This means that money available today is worth more than the same amount of money available in the future, due to the potential for earning interest or returns on the money. In this case, you need to compare the value of $1,000 today with the value of $1,200 in five years. If you can earn a rate of return greater than 4% over the next five years, it would be better to take the $1,000 today and invest it to earn a higher return. However, if you cannot earn a return greater than 4%, it would be better to wait and take the $1,200 in five years.

2. Interest rates and compounding periods will vary depending on the financial institution and type of account. As an example, let's assume that you are considering a savings account, checking account, and money market account with the following interest rates and compounding periods:

Savings account: 2% interest rate compounded annuallyChecking account: 0.1% interest rate compounded monthlyMoney market account: 2.5% interest rate compounded quarterly

Using a compound interest calculator, the future value of $1,000 in each account after five years would be:

Savings account: $1,104.08Checking account: $1,005.02Money market account: $1,130.47

3. The value of money today can be different from its value in the future due to inflation, changes in interest rates, economic growth, and changes in the supply and demand for goods and services. Inflation is one of the biggest factors that can affect the value of money over time. If the rate of inflation is high, the value of money will decrease over time, meaning that the same amount of money will buy fewer goods and services in the future. On the other hand, if the rate of inflation is low, the value of money will increase over time, meaning that the same amount of money will buy more goods and services in the future. Interest rates can also affect the value of money, as higher interest rates can make it more attractive to save money, while lower interest rates can make it more attractive to borrow money. Economic growth and changes in the supply and demand for goods and services can also affect the value of money, as these factors can affect the overall price level of goods and services in the economy.

A
65°
B
Reflex Angle B =
degrees.

Answers

The solution is, B = 245, is a Reflex Angle., when it is given that A=65.

What is an angle?

In Plane Geometry, a figure which is formed by two rays or lines that shares a common endpoint is called an angle. The two rays are called the sides of an angle, and the common endpoint is called the vertex.

We know that, a ray is a line that continues on forever inn one direction with a point at it's start.

here, we have,

A = 65°

now,  B is a Reflex Angle ,

so, we know that Reflex Angle means the angle with value >180 to <270.

now, we get,

B = 180 + 65

  = 245

Hence, The solution is, B = 245, is a Reflex Angle.

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Black diamond ski resort charges $25 for ski rental and 10$ an hour to ski bunny hill ski resort charges $50 for ski rental and $5 an hour to ski. Create an equation to determine at what point the cost of both ski slopes is the same

Answers

skiing for 5 hours will make the cost of skiing at both ski resorts equal.

What is algebraic Expression?

Any mathematical statement that includes numbers, variables, and an arithmetic operation between them is known as an expression or algebraic expression. In the phrase 4m + 5, for instance, the terms 4m and 5 are separated from the variable m by the arithmetic sign +.

Given, Bunny Hill Ski Resort charges $50 for ski rentals and $5 per hour of skiing, while Black Diamond Ski Resort charges $25 for rentals and $10 per hour of skiing.

Let's define:

x as the number of hours of skiing

C₁ as the total cost of skiing at Black Diamond ski resort

C₂ as the total cost of skiing at Bunny Hill ski resort

At Black Diamond ski resort, the total cost of skiing is the sum of the cost of rental and the cost of skiing per hour:

C1 = 25 + 10x

At Bunny Hill ski resort, the total cost of skiing is the sum of the cost of rental and the cost of skiing per hour:

C₂ = 50 + 5x

We want to find at what point C₁ = C₂, so we set the two equations equal to each other:

25 + 10x = 50 + 5x

Simplifying the equation, we get:

5x = 25

Dividing both sides by 5, we get:

x = 5

Therefore, skiing for 5 hours will make the cost of skiing at both ski resorts equal.

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If a least-squares regression line fits the data well, what characteristics should the residual plot exhibit? Sketch a well-labeled example

Answers

x' is the mean of all the x-values,  y' is the mean of all the y-values, and n is the number of pairs in the data set.

[tex]y=b_1x+b_0[/tex]

There is always one straight line that fits the data more accurately than any other, in the sense of minimizing the total of the squared errors, given any set of integers in pairs (apart from the case when all the x-values are the same). The least squares regression line is what it is known as. Additionally, its slope and y-intercept have formulae.

Given a collection of pairs (x,y) of numbers, there is a line [tex]y=b_1x+b_0[/tex] that best fits the data in the sense of the least squares regression line, its slope is b1 and the y-intercept is b0.

[tex]b_1=\frac{SS_{xy}}{SS{_xx}}}\\\\and\\\\b_0=y-b_1x\\\\SS_{xx}=\sumx^2-1/n[\sum x]^2\\\\SS_{xy}=\sum{xy}-1/n(\sum x)(\sum y)[/tex]

x' is the mean of all the x-values,  y' is the mean of all the y-values, and n is the number of pairs in the data set.

[tex]y=b_1x+b_0[/tex]

specifying the least squares regression line is called the least squares regression equation.

Example,

Find the least squares regression line for the five-point data set

x = 2  2  6  8  10  

y=  0  1   2  3  3.

compute the table,

x   y     x2         xy

2  0     4           0

2  1      4            2

6   2   36       12

8   3   64        24

10  3   100    30

28  9   208    68   (sum)

[tex]S_{xx}=208-(1/5)(28)^2=51.2\\\\SS_{xy}=68-(1/5)(28)(9)=17.6\\\\x'=\frac{28}{5}=5.6\\\\y'=1.8\\\\b_1=17.6/51.2=0.34375\\\\b_0=y-b_1(x)=1.8-(0.34375)(5.6)= -0.125[/tex]

The regression line is y=0.34375x-0.125

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What is the rate of change?

Answers

Answer:

Step-by-step explanation:

75%

Given the following segment lengths find a length of the segment

Answers

The length of the line segment AB is 11/2 mm.

What is a triangle?

A triangle is a three-sided closed-plane figure formed by joining three noncolinear points.

Based on the side property triangles are of three types they are Equilateral triangle, Scalene triangle, and Isosceles triangle.

We know a line segment parallel to one side of a triangle divides the other two sides in the same ratio.

Therefore, AC/AB = EC/ED.

22/AB = 44/11.

2/AB = 4/11.

4AB = 22.

AB = 11/2.

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Rochelle is conducting an experiment on cells of Elodea, a kind of water plant. To induce plasmolysis at the correct rate, she needs to use an 8% saline solution, but she has only the solutions shown on hand.

A. If Rochelle mixes the two solutions to get 100 mL of an 8% saline solution, which will she use more of? Explain.

Enter your answer.

B. How can Rochelle determine the amount of each solution she needs to make the 8% saline solution?

Enter your answer.

C. Use Appropriate Tools Are there any methods for solving this problem other than the one you used in part B? Explain.

Enter your answer.

Answers

A pharmacist wants to mixture of 40 % saline solution with a 12% saline solution to get 119 ml. of a 32% saline solution. He used 85 ml of 40% saline solution and 34 ml of 12% saline solution.

What is  mixture?

Mixture word problems require you to combine two or more separate items, and then calculate some quantity of the resulting mixture (such as a percentage, price, or number of liters, for example). There will always be some type of "rate," like miles per hour or price per pound. Mixtures are substances that contain two or more distinct substance categories. To separate them, utilize physical tools. Examples include air, different gases, a mixture of sugar and water, a solution of salt and water, and so on.

here, we have,

Given,

A pharmacist wants to mixture of 40 % saline solution with a 12% saline solution to get 119 ml. of a 32% saline solution.

Equation:

X + y = 119

y = 119 - x

0.40x + 0.12y = 119 of 0.32

0.40x + 0.12y = 38.08

Using y = 119 -x

0.40x + 0.12(119 - x) = 38.08

0.40x + 14.28 - 0.12x = 3808  Eq(2)

0.28x = 23.8

x = 85

and,

y = 119 - 85

y = 119 - 85

y = 34

Equating values in equation (2),

=0.40(85) + 0.12(34)

=34 + 4.08

=38.08

A pharmacist wants to mix a 40 % saline solution with a 12% saline solution to get 119 ml. of a 32% saline solution. He used 85 ml of 40% saline solution and 34 ml of 12% saline solution.

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The diameter of a circle is 24 cm. Find its area to the nearest whole number.

Answers

A~452.39 cm^2 is the right answer

Answer:

Area = 452 cm²

Step-by-step explanation:

[tex] = \frac{\pi }{4} {d}^{2} [/tex]

[tex] = \frac{\pi}{4} {(24)}^{2} = 452.39 \: cm²[/tex]

is this relationship proportional 4/5 = 15/20

Answers

Answer:no

Step-by-step explanation:

if it was then it supposed to be like 4*20=5*15 which is not right equation

What is 60 kph into miles?

Answers

60 kilometers per hour (kph) is equal to  roughly 37.28  long hauls (miles) per hour( mph).

To convert kilometers per hour to long hauls per hour, you can use the following conversion formula:

long hauls per hour =  kilometers per hour x0.621371.

Plugging in 60 kilometers per hour, we get,

long hauls per hour =  60 x0.621371  

long hauls per hour ≈37.28.  

Thus, 60 kilometers per hour is roughly 37.28 long hauls per hour.  

A kilometer (km) is a unit of length or distance used in the metric system. It is roughly original to 0.621  long hauls.

Mile is a unit of length or distance used in the customary system of dimension, primarily in the United States and United Kingdom. One afar is original to 280 bases or 760 yards, which is  roughly 1.609 kilometers in the metric system.

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7 27. MODELING REAL LIFE Find the length of the slide.
(See Example 6.)
MTR
12 ft
53°

Answers

The length of the slide shown is 15 feet

What is an equation?

An equation is an expression that shows the relationship between two or more numbers and variables using mathematical operations. An equation can be linear, quadratic, cubic and so on, depending on the degree of the variable.

Trigonometric ratio is used to show the relationship between the sides and angles of a right angled triangle.

Let l represent the length of the slide, hence:

sin(53) = 12/l

l = 12/sin(53)

l = 15 feet

The length is 15 feet

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Please help quickly!!! The triangles are similar. AC=___ units

Answers

Answer:

Step-by-step explanation:

EB/BC=15/12=5/4

ED/AC=X+5/Y=5/4

5y=4x+20

y=0.8x+4

What are the rational roots of the polynomial P(x) = x^3 + 3x^2 + x - 1

Answers

The rational roots of the polynomial P(x) = x^3 + 3x^2 + x - 1 can be found using the Rational Root Theorem.

The Rational Root Theorem states that if a polynomial has a rational root, it will be in the form of p/q, where p is a factor of the constant term and q is a factor of the leading coefficient. In this case, the constant term is -1 and the leading coefficient is 1. The factors of -1 are -1 and 1, and the factors of 1 are 1. Therefore, the possible rational roots of this polynomial are -1/1, 1/1, or -1 and 1.

We can test these possible roots by plugging them into the polynomial and seeing if the result is 0.

P(-1) = (-1)^3 + 3(-1)^2 + (-1) - 1 = -1 + 3 - 1 - 1 = 0
P(1) = (1)^3 + 3(1)^2 + (1) - 1 = 1 + 3 + 1 - 1 = 4

Therefore, the only rational root of this polynomial is -1.

So, the rational roots of the polynomial P(x) = x^3 + 3x^2 + x - 1 are -1.

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Find the weighted average of the numbers -3 and 5 with 3/5 lf the weight on the first number and 2/5 on the second number.

Answers

The weighted average of the numbers is 0.1.

What is the average?

The ratio of the sum of the values in a particular set to all the values in the set is the mean value, which is the definition of the average.

Given that, average of the numbers -3 and 5 with 3/5

The weight of first number and 2/5 of second number.

Here, -3(3/5)+5(2/5)/2

= (-1.8+2)/2

= 0.2/2

= 0.1

Therefore, the weighted average of the numbers is 0.1.

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What is the area of the figure below?
10cm

Answers

Area of square

A1=10•10= 100 cm^2


*Semicircle = 5 cm

2(3.14•5^2)

157 cm^2


A=100+157


Solution

257 cm^2


Two planes, which are 2235 miles apart, fly toward each other. Their speeds differ by 45 mph. If they pass each other in 3 hours, what is the speed of each?

Answers

In a case whereby two planes, which are 2235 miles apart, fly toward each other. Their speeds differ by 45 mph. If they pass each other in 3 hours, the speed of slower is 350mph and faster is 395mph.

How can the speed of each be calculated?

The concept here is simplification.

Let represent the speed of the slower plane using the( x),

Let us represent the speed of the faster to be ( x + 45)

The distance traveled  that can be associated to the slower plane ( 3x).

then the distance that can be attributed toi that of the faster plane = 3(x + 45).

given that the  total distance=(2235 miles).

[3x + 3(x + 45) ]= 2235

3x + 3x + 135= 2235

[6x ]= 2235-135

6x = 2100

x=350

hence,  the speed of the slower plane is 350

the speed of the faster= x + 45 = 350+45= 395

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The speed of first plane is 350 miles/hour and the speed of second plane is 395 miles/hour .

Given, Distance between the planes = 2235 miles

Let, the speed of the first plane be 'x' miles/hour.

Let, the speed of the second plane be 'x+45' miles/hour.

Since, they are flying towards each other, their speed will get added.

The collective speed of both the planes = (2x + 45) m/h.

A/Q, they pass each other in 3 hours, i.e. they collectively covers the distance of 2235 miles in 3 hours.

We know Distance = Speed × Time

Given, Distance = 2235 miles , Time = 3 hours , Speed = (2x + 45) m/h

                      2235 = 3  × (2x + 45)

                       745 = 2x + 45

                        x = 350 miles/hour.

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