Mathematics High School

.Wind is related to the movement of warm and cold air masses. Which kind of heat transfer does this represent? ANSWERS: A. radiation


B. conduction


C. convection


D. absorption

Answers

Answer 1
C. Convection 
Explanation: Convection heat transfer creates wind because hotter, less dense air rises, while colder, more dense air moves downward. This movement of heated and cooled air is wind.
Answer 2

Answer:

Convection

Step-by-step explanation:

Related Questions

how fast is the water level rising in a rectangular fish tank whose base is 20 ft^2 if the tank is being filled at a rate of 0.5ft^3/min

Answers

V = Bh
0.5 ft^3 = (20 ft^2)h
h = (0.5 ft^3)/(20 ft^2) = 0.025 ft

The rate of change of water depth is 0.025 ft/min.

The water level is rising at a rate of 0.025 ft/min.

To determine how fast the water level is rising in the rectangular fish tank, you can use the formula for the volume of a rectangular prism:

V = base area × height

Given that the base area is 20 [tex]ft^2[/tex] and the tank is being filled at a rate of

0.5 cube ft/min, you want to find the rate at which the height (h) is changing  [tex](\frac{dh}{dt} )[/tex].

V = base area × height

[tex]\frac{d V}{d t}=\text { base area } \times \frac{d h}{d t}[/tex]

Substitute the known values:

0.5 = 20 x [tex](\frac{dh}{dt} )[/tex]

Now, solve for [tex](\frac{dh}{dt} )[/tex]

[tex]\frac{d h}{d t}=\frac{0.5}{20}[/tex] = 0.025 ft/min

Thus, the required answer is 0.025 ft/min.

Which ordered pair is a solution for this system of inequalities?
2x + 3y > 1 and y < 5/4 x - 1

A.(3, 9)
B.(-4, 2)
C.(8, -1)
D.(-2, -5),

Answers

C. (8, -1)

For this problem, the easiest method is to simply try each of the 4 possible answers and see which one fits. So
A. (3, 9)
2x + 3y > 1
2*3 + 3*9 > 1 ; Obviously true, not going to finish calculation.

y < 5/4 x - 1
9 < 5/4 3 - 1
9 < 15/4 - 1 ; Obviously false, not going to finish calculation.

B. (-4, 2)
2x + 3y > 1
2*(-4) + 3*2 > 1
-8 + 6 > 1 ; Obviously false, not going to finish calculation.
No need to bother with 2nd inequality.


C. (8, -1)
2x + 3y > 1
2*8 + 3*(-1) > 1
16 - 3 > 1 ; Obviously true, not going to finish calculation.


y < 5/4 x - 1
-1 < 5/4 * 8 - 1
-1 < 40/4 - 1
-1 < 10 - 1 ; Obviously true, not going to finish calculation.
Both inequalities satisfied, this is the correct choice.

D. (-2, -5)
2x + 3y > 1
2*(-2) + 3*(-5) > 1; Left hand side is obviously negative, so obviously false,
not going to finish calculation.
No need to bother with 2nd inequality.

Given that the points (-3, 8), (2, 8), (2, -2), and (-3, -2) are vertices of a rectangle, what is the ratio of the rectangle's length to its width?

Answers

let
A ---> (-3, 8)
B ---> (2, 8) 
C----> (2, -2) 
D----> (-3, -2)

step 1
find the distance AB
d=√[(y2-y1)²+(x2-x1)²]-----> d=√[(8-8)²+(2+3)²]----> d=√25-----> d=5 units

step 2
find the distance BC
d=√[(y2-y1)²+(x2-x1)²]-----> d=√[(-2-8)²+(2-2)²]----> d=√100-----> d=10 units

step 3
find the ratio of the rectangle's length to its width
ratio=rectangle's length/rectangle's width
length=10 units
width=5 units
ratio=10/5-----> ratio=2

the answer is 
 the ratio of the rectangle's length to its width is 2

see the attached figure

Answer:

2:1

Step-by-step explanation:

The triangles are congruent by SSS or HL. The diagram shows the sequence of three rigid transformations used to map ABC onto A"B"C". What is the sequence of the transformations? rotation, then reflection, then translation rotation, then translation, then reflection reflection, then translation, then rotation reflection, then rotation, then translation

Answers

Answer:-  The sequence of the transformations for the given diagram must be reflection, then rotation, then translation.


Explanation:-

Given : Four triangles which are congruent by SSS postulate or HL theorem.

According to the given diagram , the rigid transformations are as follows

1. Reflection: ΔABC is flipped about BC to form ΔA'BC such that AC=A'C and its is already given that they are congruent thus the rigid transformation used here is reflection.

2. Rotation:- ΔA'BC is rotated about point A' at some angle to form ΔA'B'C' , and they are congruent (given). Thus the rigid transformation used here is rotation.

3.Translation:- ΔA'B'C' is translated exactly right by some factor to form ΔA"B"C" ∵ all the points have changed but as these triangles are congruent (given) then corresponding parts must be equal.Thus the rigid transformation used here is  translation.

The sequence should be in the order for the given transformation as, reflection, then rotation, then translation. Thus the option D is the correct option.

How to rotate, reflect, and translation the figure?

Rotation, reflection and translation is the way of transformation of an figure.

Rotation- Rotation of an object is rotating it about a fixed point without changing its shape and size.

Reflection- Reflecting of an object is flipping it across a line without changing its shape and size.

Translation- Translation of an object is the shifting of the object without changing its dimensions, without rotating it and without reflecting it.

Given information-

In the given diagram the, triangle ABC is transformation into the three stages.

First the figure ABC is just flipped into the triangle A'BC by keeping the side BC fixed.Then the triangle A'BC is rotated around the point A' and to place of A'B'C'.Finally the figure is transact right from one place to another which is A"B"C".

Hence the correct sequence of the transformations is  reflection, then rotation, then translation. Thus the option D is the correct option.

Learn more about the rotation and reflection of figure here;

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Find the ratio of the longest side to the perimeter of the​ right-triangular-shaped billboard. 20 feet 21 feet 29 feet

Answers

29:70

29/70

29 to 70

the ratio is 29 ft. to 70 ft.

Solution:

we have been asked to find the ratio of the longest side to the perimeter of the​ right-triangular-shaped billboard.

Sides of the right-triangular-shaped billboard are 20 feet 21 feet 29 feet.

As we know perimeter is just the sum of all the sides.

Perimeter[tex]=20+21+29=70\\[/tex]

And the longest side is 29 feet.

Hence the required ratio  [tex]=\frac{29}{70}=29:70[/tex]

A rectangle is 7 feet long by 2 feet wide. If 2 feet are added to the length of the rectangle, what would be the area, in square feet, of the new rectangle?

Answers

it would be 9 x 2 so the area would be 18 sq ft

If a rectangle is 7 feet long by 2 feet wide and  2 feet are added to the length of the rectangle then the area of rectangle is 18 square feet.

What is Area of Rectangle?

The area of Rectangle is length times of width.

Given that a rectangle has a length of 7 feet.

The width of rectangle is 2 feet.

We have to find the area of rectangle when 2 feet is added to the length of rectangle

Initial length is 7 feet

When 2 feet is added the length will be 7+2, 9 feet.

Area of rectangle = Length × width

=9×2

Nine times two is eighteen.

=18 square feet.

Hence, if a rectangle is 7 feet long by 2 feet wide and  2 feet are added to the length of the rectangle then the area of rectangle is 18 square feet.

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A horizontal line goes through the point (–7,10). Which statements are true about this line? Check all that apply. The slope of the line is zero. Another point on the line is (3,10). The y-intercept of the line is –7. The equation of the line is y = 10.

Answers

A. The slope of the line is zero. True
All horizontal lines have a slope of 0

B. Another point on this line is (3,10). True
All points on this line have a y coordinate of 10

C. The y intercept of the line is -7. False
The y intercept is 10 which is at the point (0,10)

D. The equation of the line is y = 10. True
The equation y = 10 indicates all y coordinates are 10 while the x coordinate is anything you want.

------------------------------------------------------------------------

Answers are: A, B, and D

The statement 1,2, and 4 are true and 3 is not true below given the reason behind it.

What is a graph?

The link between lines and points is described by a graph, which is a diagrammatic representation of a network.

A graph is made up of some points and the distance between two It doesn't matter how much time the lines are or where the points are located. A node is a name for each constituent in a graph.

The given statement is a line passing through ( -7, 10 ) so

Option 1 ⇒ the slope of that line will be zero because it is a horizontal line so it will be true.

Option 2 ⇒another point on this line will be (3,10) since it is a horizontal line so the y coordinate is the same and the x coordinate can vary so it is also true.

Option 3 ⇒ the y-intercept of this line will be 10 which is not true and can be confirmed by options 1 and 2.

Option 4 ⇒ the equation of the line will be y =10 which is true hence it is a horizontal line.

For more details about the graph

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If arc XV = 68° and ∠YUV = 36°, what is the measure of arc VY?

Answers

the complete question in the attached figure

we have
arc XV = 68°
∠YUV = 36°
 
we know that
The measure of the external angle is the semidifference of the arcs that it covers.
therefore
∠YUV =[arc VY-arc XV]/2
arc VY=[2*∠YUV]+arc XV----------> [2*36]+68---------> 140°

the answer is
the measure of arc VY is 140°

Where is the centroid of any given triangle?
A. the point of concurrency of the altitudes of the triangle.
B. the point of concurrency of the medians of the triangle.
C. the point of concurrency of the perpendicular bisectors of the triangle.
D. the point of concurrency of the angle bisectors of the triangle.
Which of the following best describes the altitude of a triangle?
A. a segment perpendicular to a side of the triangle.
B. a segment that passes through the midpoint and is perpendicular to a side of a triangle.
C. a segment drawn from the ve

Answers

 The answers are the following:

1. The centroid of any given triangle is at B. the point of concurrency of the medians of the triangle. It is a point is where the three points of the medians of the triangle meet.

2. B. a segment that passes through the midpoint and is perpendicular to a side of a triangle. It is line segment that is perpendicular to a line containing the base 

4) A mountain climber climbed up a cliff 1/4 mile at a time. he did this 5 times in one day. How many miles did he climb up? *

Answers

He climbes 1 1/4 miles.
1/4+1/4+1/4+1/4+1/4= 1 1/4.

Regard triangleTRI and the following facts:
Segment IR || Segment NA
TA= 12 cm, RA= 3 cm, NT= 18 cm, AN= 22

(a)What theorem or postulate proves Triangle ANT similar to RIT?(b)Solve for NI by using the Side-Splitting Theorem.Show all work.(c)What is the scale factor for similar triangles ANT and RIT?
(d)Calculate RI. Show your work.
(e)What is the ratio of the areas of the two triangles? Show your work.

Answers

A) Using the side-splitter theorem we know that the sides that are intersected by the parallel lines are proportional.  It can also be shown that the angles are congruent due to the parallel segments cut by a transversal.
B) NI = 4.5
C) 4:5
D) RI = 27.5
E) 16:25

Explanation
We will set up a proportion for b:
AT/RT = NI/TI
12/15 = 18/x

Cross multiply:
12*x = 18*15
12x = 270

Divide both sides by 12:
12x/12 = 270/12
x = 22.5

Since TI = TN + NI, we have
22.5 = 18 + NI
-18       -18
4.5 = NI

C) The ratio of the sides of the smaller triangle to the larger rectangle are given by the ratio AT/RT, or 12/15 = 4/5.

D)  Setting up a proportion we have
AN/RI = AT/RT
22/RI = 12/15

Cross multiply:
22*15 = RI*12
330 = 12RI

Divide both sides by 12:
330/12 = 12RI/12
RI = 27.5

E)  The ratio of the areas will be the square of the ratio of the side lengths, since area is a square measurement:
(4/5)² = 4²/5² = 16/25

PLS HELP ME ASAP ON THIS!! THANK YOU SO MUCH!!

BRAINLIEST WILL BE GIVEN



(RANDOM ANSWERS GETS MODERATED.)

Answers

Your picture shows 3 combinations that are sufficient to tell you the price of each item.

The other two are
.. 0 fries + 1 shake + 1 burger = 4.20
.. 1 fries + 1 shake + 0 burger = 2.80

_____
Add any two orders and subtract the third to find the cost of one of the items.
For example add the two orders written above and subtract the one shown in the picture.
.. (1 fries + 2 shakes + 1 burger) - (1 fries + 1 burger) = (4.20 +2.80) -(3.40)
.. 2 shakes = 3.60
.. 1 shake = 1.80
Then the last equation tells you
.. 1 fries = 2.80 - 1 shake = 1.00
and the first equation tells you
.. 1 burger = 3.40 - 1 fries = 2.40

1 fries = $1.00
1 shake = $1.80
1 burger = $2.40

Explain what needs to happen to the inequities sign when dividing or multiplying by a negative number

Answers

Inequality symbols need to be reversed when multiplying or dividing by a negative number, because that reverses the ordering of values.
2 > 1
-2 < -1 . . . . . multiplied or divided by -1

___
A more "interesting" case is when a function is applied that has a negative slope.
0 < a < b < π
cos(0) > cos(a) > cos(b) > cos(π)

find the exact value of cos285 using the fact that 285=330-45

Answers

[tex]\bf \textit{Sum and Difference Identities} \\\\ cos(\alpha - \beta)= cos(\alpha)cos(\beta) + sin(\alpha)sin(\beta)\\\\ -------------------------------\\\\ cos(285^o) \\\\\\ cos(330^o-45^o)=cos(330^o)cos(45^o)+sin(330^o)sin(45^o) \\\\\\ cos(330^o-45^o)=\left( \frac{\sqrt{3}}{2} \right)\left( \frac{\sqrt{2}}{2} \right)~~+~~\left( \frac{1}{2} \right)\left( \frac{\sqrt{2}}{2} \right) \\\\\\ cos(330^o-45^o)=\cfrac{\sqrt{6}}{4}+\cfrac{\sqrt{2}}{4}\implies cos(330^o-45^o)=\cfrac{\sqrt{6}+\sqrt{2}}{4}[/tex]

Laila is having shirts made with a logo printed on them to promote her band. The total cost consists of a one-time fee of $75 to have the logo designed, plus $8 per shirt to print the logo. Write an equation that Laila can use to determine the total cost c, in dollars, to make x shirts

Answers

c=8x+75 c is equal to cost and x is equal to the amount of shirts

can someone help me with this?

Answers

It's C.

I did it by plugging the functions into a graphing calculator and seeing which one matched, but you could also plug in 2 or 3 values into each x position and see which one's results matched with the shown function.

Somebody help. I can’t figure this question out. thanks

Answers

The large triangle and the smaller one are similar. Comparing long sides to short ones, we get
.. (30 mm)/(21 mm) = (14 mm +x)/(14 mm)
.. (14 mm)*10/7 = 14 mm +x
.. (14 mm)*(10/7 -1) = x
.. (14 mm)*(3/7) = x = 6 mm

The value of x is 6 mm.

[tex]21 \div 30 = 14 \div 14 + x[/tex]
[tex]30 \times 14 = 420[/tex]
[tex]21 \times 14 + x = 294 + 21x[/tex]
[tex]420 = 294 + 21x[/tex]
[tex]420 - 294 = 126[/tex]
[tex]126 = 21x[/tex]
[tex]126 \div 21 = 6[/tex]
[tex]x = 6[/tex]

Is the mean always a more accurate measure of center than the median

Answers

I want to say yes it is but it's been a little while since I have learned this

trevor needs to let his puppy outside every quarter (1 fourth) hour to potty train him. draw and label a number line from 0 hours to 1 hour to show every 1 fourth hour.

Answers

make a number line and make it into four parts that shows that needs to let his puppy outside every 25 min.

Factor completely: 9ab + 12ax - 6b - 8x (1 point)
1. Prime
2. (3b - 4x)(3a - 2)
3. (3b + 4x)(3a - 2)
4. (3b + 4x)(3a + 2)

Answers

3. (3b + 4x)(3a - 2) is correct.
Use FOIL to expand each factored form, only #3 will result in 9ab + 12ax - 6b - 8x
the correct answer would be C or #3

A circular piece of glass has a radius of 2.1 meters. The glass sells for $1.70 per square meter. What is the total cost of the circular piece of glass?

$23.54


$94.16


$3.57


$11.21

Answers

the answer is $3.57 because $1.70x 2.1 is $3.57 

The original value of a car is 18000, and it depreciates (loses value) by 15% each year. What is the value of the car after three years?

Answers

At the end of each year, the value is 100% -15% = 85% = 0.85 what it was at the beginning of the year. After 3 years, the value is
.. 18,000*0.85^3 = 11,054.25

Cheryl volunteers to mow the lawn at a retirement home.She can mow 1/4 of the lawn in 3/4 of an hour .At what rate ,how many hours will it take Cheryl to mow the entire lawn

Answers

It will take three hours to mow the grass.
Hey there!

Since she mows 1/4 in 3/4 hours, you can multiply 4 and 3/4 . . .

4 = 4/1

3/4 = 3/4

4 x 3 = 12

1 x 4 = 4

Simplifying 12/4 . . .

12/4 = 3  <---------

It will take 3 hours for Cheryl to mow the entire lawn.

Hope this helps you.
Have a great day!

Soon you will determine the right triangle connection the pythagorean theorem

Answers

I don't know I just need the points Lol sorry

please help me thank you.

Answers

The length of an arc (s) is given in terms of the circle radius (r) and the central angle (θ) by
.. s = rθ . . . . . . . . . . . θ in radians

Your arc length is
.. s = (5 m)*(2π/3)
.. = 10π/3
.. ≈ 10.47 m

The 3rd selection is appropriate.

Jose owns 40 shares of stock A whose price increased by $0.75 per share. He also owns 100 shares of stock B whose price decreased by $0.20 per share. What is the total change in the value of Paul’s stock (A and B together)?


PLEASE HELP!

Answers

it will increase the current value.
40*$0.75 +100*(-$0.20) = $30 -20 = $10

Paul's portfolio increased in value by $10.

What is the simplified form of (x – 2)(2x +3)? Use the Distributive Property. (1 point)
2x2 – x – 6
2x2 – 6
2x2 – 7x – 6
2x2 + x – 6
2. What is the simplified form of (3x + 2)(4x – 3)? Use a table. (1 point)
12x2 + 18x + 6
12x2 + x – 6
12x2 + 18x – 6
12x2 – x – 6
3. What is the simplified form of (4p – 2)(p – 4)? (1 point)
4p2 + 6p – 16
4p2 – 18p + 8
4p2 – 14p – 6
4p2 – 6p + 16
4. The radius of a cylinder is 3x – 2 cm. The height of the cylinder is x + 3 cm. What is the surface area of the cylinder? Use the formula A = 2r2 + 2rh.,

Answers

1. 2x2 – x – 6
2. 12x2 – x –6
3. 4p2 – 18p + 8

Find the volume for the regular pyramid.

4 cu. units
6 cu. units
12 cu. units

Answers

4 cu units
Formula is V = lwh/3
v=volume
I=base length
w=base length
h=base height

Answer:

[tex]4\ cu.\ units[/tex]

Step-by-step explanation:

we know that

The volume of the pyramid is equal to

[tex]V=\frac{1}{3}Bh[/tex]

where

B is the area of the base of the pyramid

h is the height of the pyramid

Find the area of the base

[tex]B=2^{2}=4\ units^{2}[/tex]

[tex]h=3\ units[/tex]

Find the volume

[tex]V=\frac{1}{3}(4)(3)=4\ units^{3}[/tex]

Circle 1: center (8, 5) and radius 6
Circle 2: center (−2, 1) and radius 2
What transformations can be applied to Circle 1 to prove that the circles are similar?
What scale factor does the dilation from Circle 1 to Circle 2 have?
Show your work.

Answers

we have that
Circle 1: center (8, 5) and radius 6
Circle 2: center (−2, 1) and radius 2

we know that
the equation of a circle is
(x-h)²+(y-k)²=r²
for the circle 1---------> (x-8)²+(y-5)²=36
for the circle 2---------> (x+2)²+(y-1)²=4

using a graph tool 
see the attached figure

Part A)What transformations can be applied to Circle 1 to prove that the circles are similar?

we know that
r1/r2---------> 6/2------> 3

to prove that the circle 1 and circle 2 are similar, the radius of circle 1 must be divided by 3 and  translate the center of the circle 1  (10) units to the left and (4) units down  

 the answer part A) is
the radius of circle 1 must be divided by 3 and  translate the center of the circle 1  (10) units to the left and (4) units down  


Part B) What scale factor does the dilation from Circle 1 to Circle 2 have?

the answer Part B) is 
the scale factor is (3/1)

A cell phone weighs about 2.8X10^n pounds. Which value of n is most reasonable? A)-3 b)-1 c)0 d)1
please help im stuckk

Answers

The average cell phone weighs about 4 ounces, or 0.25 pounds... 0.28 is closest to this number.

2.8 * 10^-3 = 0.0028 - Much too light

2.8 * 10^-1 = 0.28 - Reasonable weight

2.8 * 10^0 = 2.8 - Too heavy

2.8 * 10^1 = Much too heavy
Just plug in every value and see if it's a reasonable weight for a cell phone.

[tex]\sf 10^{-3}=0.001[/tex]
[tex]\sf 10^{-1}=0.1[/tex]
[tex]\sf 10^0=1[/tex]
[tex]\sf 10^1=10[/tex]

[tex]\sf 2.8\times 0.001=0.0028[/tex]
[tex]\sf 2.8\times 0.1=0.28[/tex]
[tex]\sf 2.8\times 1=2.8[/tex]
[tex]\sf 2.8\times 10=28[/tex]

So what is the most reasonable weight for a cell phone? 0.0028 pounds, 0.28 pounds, 2.8 pounds, or 28 pounds? I would definitely say 0.28 pounds.
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