Iron can exist as a solid or liquid. Which statement best comparison solid iron and liquid iron?
A. Solid iron and liquid iron have the same type of atoms.
B. Solid iron and liquid iron have different types of atoms.
C. Solid iron is an element, and liquid iron is a compound.
D. Liquid iron is an element, and solid iron is a compound.
Answer: Iron, a solid at room temperature, becomes a liquid at 2800 degrees Fahrenheit (really, REALLY hot) and a gas at 5182 degrees Fahrenheit (about half the temperature of the sun). When things are hot, the molecules and atoms move around more and faster, and when they are cold they are slower.
Step-by-step explanation:
Answer:
a
Step-by-step explanation:
Which measure of central tendency best describes the data set below?
{1, 2, 3, 4, 5, 6, 12, 23}
A. the mean, 7
B. the mode, 4
C. the range, 22
D. the median, 4.5
Answer:
It is the mean
Step-by-step explanation:
Which measure of central tendency best describes the data set below?
{1, 2, 3, 4, 5, 6, 12, 23}
=mean
56 Divided by 8=7 mean=7
It’s a. the mean, 7 Or d. the median, 4.5
What is the, to the nearest tenth of the line segment joining the points (-4,2) and (146,52)?
Answer:
158.1
Step-by-step explanation:
what is the length of ST?
Answer:
5 cm
Step-by-step explanation:
Let's assume this is a number line were given.
Distance of S from 0 = 4 units
Distance of T from 0 = 9 units
Length of ST = the difference between T and S
ST = |9 - 4| = 5 units = 5 cm
This means S and T are 5 cm apart.
Hello, can anyone help me by answering all these? Please
Answer: See step by step
Step-by-step explanation: For A my 15 statements are.
It has 3 triangles inside it, ACD, ADC, and ABCIt has 2 right triangles, and 1 isocelesAC≅ABCD≅DBD is midpoint of CBAD⊥CBAngle CDA=90 degreesAngle BDA equal 90 degreesAD≅ADΔCDA≅ΔBDA by any congruence theorem, (SSS, SSA,AAS,ASA, HL) [tex]AD^{2}[/tex]+ [tex]DB^{2}[/tex]=[tex]AB^{2}[/tex]12.[tex]AD^{2}[/tex]+ [tex]CD^{2}[/tex]= [tex]AC^{2}[/tex]
13. Triangle ABC has a max of 180 degrees.
14. We can rotate this triangle 180 degrees and it will coincide.
15. We can reflect triangle ACD over vertical line ACD and it will be congruent to ABD.
2. We use pythagorean theorem since it has a right angle.
[tex]AD^{2}[/tex]+ [tex]DB^{2}[/tex]=[tex]AB^{2}[/tex] Let plug it in.
[tex]40^{2}[/tex]+[tex]b^{2}[/tex]=[tex]45^{2}[/tex]
1600+ b^2=2025
b^2=424
sqr root of 425 is about 21. Now let find the perimeter.
AB is 45, Since BD+DC=CB, and they are congruent they are equal so 21+21=42 and AC is congruent to AB so it is 45. So the perimeter is 132.
For 3. Start at the orgin, then go up 5 on the y-axis so you should be at (0,5)
Then use the rise over run method to graph it. go left -3 and and up 1. Keep doing that 2 more times then draw a straight line.
Your 3 point should be
(0,5)
(1,2)
(2,1)
F(x)=6x+7, evaluate f(x)=49
Answer:
X=7
Step-by-step explanation:
Since we have the function F(x)=6x+7, and we are given f(x)=49, we know that 6x+7=49.
Thus, solve for x
6x+7=49
6x=42
x=42/6
x=7
Hope this helps :)
4.) Anoki wants to determine the height of a vertical lighthouse, shown below. He measures the angle of
elevation to the top of the lighthouse at a point 103 feet along level ground from the center of the base of the
lighthouse. The angle of elevation is 31º. Which of the following expressions gives the best approximation
of the height of the lighthouse, in feet?
D. 103 cos 31°
cos 31°
A.
103
tan 31°
B.
103
C. 103 sin 31°
E. 103 tan 31°
310
103
The tangent or tanθ in a right angle triangle is the ratio of its perpendicular to its base. The height of the lighthouse is 103×tan 31°.
What is Tangent (Tanθ)?The tangent or tanθ in a right angle triangle is the ratio of its perpendicular to its base. it is given as,
[tex]\rm Tangent(\theta) = \dfrac{Perpendicular}{Base}[/tex]
where,
θ is the angle,
Perpendicular is the side of the triangle opposite to the angle θ,
The base is the adjacent smaller side of the angle θ.
Given that the distance between the Anoki and the lighthouse is 103 feet, while the angle between Anoki and the top of the lighthouse is 31°. Therefore, using the tangent function of the trigonometry we can write the height of the lighthouse as,
[tex]\rm Tangent(\theta) = \dfrac{Perpendicular}{Base}[/tex]
[tex]\rm tan(31^o) = \dfrac{\text{Height of the lighthouse}}{103\ feet}\\\\\text{Height of the lighthouse} = 103 \times tan(31^o)\\\\[/tex]
Hence, the height of the lighthouse is 103×tan 31°.
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please solve for x and explain every step in detail!!! it’s urgent
Answer:
[tex] x = zk + z + \mu[/tex]
Step-by-step explanation:
[tex] z = \frac{x - \mu}{k + 1} \\ \\ z(k + 1) = x - \mu \\ \\ z(k + 1) + \mu =x \\ \\ \red{ \bold{ x = zk + z + \mu}}[/tex]
Two parallel lines intersected by more than one transversal. Let x=45 find measure of angle 1,2 and 3
Answer: to me i think u ar missing the distance between the parallel lines
Step-by-step explanation:
If the minute hand of a clock rotates 6 degrees every minute. Determine how minutes does it take to rotate 2160
degrees. (1 point)
Ot=360
Ot= 340
Ot=180
Ot = 2160
Answer:
Yo wassup. To your question it will be 360 degrees.
Step-by-step explanation:
Now bro can you mark as brainlest?
Grandma's Recipe for Sugar Cookies
1 cups kutter
2 cups sugar
4 eggs
12 teaspoon baking powder
1% cups flour
4 teaspoon salt
Your sister wants to make more cookies and decides to use 4 cups of sugar. She says that she
will need to use 3 cups of flour. Do you agree with her? Explain your reasoning.
Solve For x. Please don't put 'I don't know.'.
Answer:
X=12
Step-by-step explanation:
Answer:
i think 128/7=x
Step-by-step explanation:
HELPPP PLSLSLS I need it for live lesson
Answer:
44g
Step-by-step explanation:
flour=7/6*150=7*25=175g
sugar=175/2=87.5g for 36 biscuits
so for 18 biscuits she needs half as much whuch is equal to 87.5/2=43.75g or 44g
Please help me with this anyone I beg
Answer:
A)336
B) In how many ways can you arrange 8 people in 3 different chairs?
C) 21
D) You want to buy 3 cartoon books from a book store that has 7 cartoon books. In how many ways can you select?
Step-by-step explanation:
A) P(n, r) = P(8, 3)
Formula for permutation is;
P(n, r) = n!/(n - r)!
P(8, 3) = 8!/(8 - 3)!
P(8, 3) = (8 × 7 × 6 × 5!)/5!
5! will cancel out to give;
P(8, 3) = (8 × 7 × 6)
P(8, 3) = 336
B) In how many ways can you arrange 8 people in 3 different chairs?
C) C(n, r) = C(7, 2)
Formula for combination is;
C(7, 2) = n!/(n - r)!r!
Thus;
C(7, 2) = 7!/(7 - 2)!2!
C(7, 2) = (7 × 6 × 5!)/(5! × 2 × 1)
5! will cancel out to give;
C(7, 2) = 7 × 6/2
C(7, 2) = 21
D) You want to buy 3 cartoon books from a book store that has 7 cartoon books. In how many ways can you select?
What is the volume of the following rectangular prism? 3 1/3 units^2
1 2/5 units
The volume of the given rectangular prism is 14/3 units³ or approximately 4 2/3 units³.
Given:
Rectangular base area = 3 1/3 units²
Height = 1 2/5 units
Convert the mixed number to improper fractions.
The rectangular base area can be written as:
= 3 + 1/3
= 3/1 + 1/3
= 10/3 units².
The height can be written as:
= 1 + 2/5
= 1/1 + 2/5
= 7/5 units.
Multiply the area of the base by the height.
Volume = Base area × Height
Volume = (10/3 units²) × (7/5 units)
Multiply the numerators and denominators separately.
Volume = (10 × 7) / (3 × 5) units³
Volume = 70 / 15 units³
Volume = 14/3 units³
Therefore, the volume of the given rectangular prism is 14/3 units³ or approximately 4 2/3 units³.
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Consider the population consisting of all computers of a certain brand and model, and focus on whether a computer needs service while under warranty.
a. Pose several probability questions based on selecting a sample of 100 such computers.
b. What inferential statistics question might be answered by determining the number of such computers in a sample of size 100 that need warranty service?
a. The probability questions are given below.
b. The inferential statistics question is:
"What is the estimated proportion of computers in the population that need warranty service based on the observed proportion in the sample?"
We have,
a.
Probability questions based on selecting a sample of 100 computers:
- What is the probability that exactly 5 computers in the sample need warranty service?
- What is the probability that more than 10 computers in the sample need warranty service?
- What is the probability that at least 2 computers in the sample need warranty service?
- What is the probability that none of the computers in the sample need warranty service?
- What is the probability that the proportion of computers needing warranty service in the sample is greater than 0.3?
These questions can provide insights into the likelihood of certain outcomes within the sample of 100 computers.
b.
Inferential statistics question that can be answered by determining the number of computers needing warranty service in a sample of size 100:
"What is the estimated proportion of computers in the population that need warranty service based on the observed proportion in the sample?"
By determining the number of computers in the sample of 100 that need warranty service, we can use inferential statistics to make an estimate or inference about the proportion of the entire population of computers of that brand and model that may require warranty service.
This can help in understanding the warranty service needs of the entire population based on the information gathered from the sample.
Thus,
a. The probability questions are given above.
b. The inferential statistics question is:
"What is the estimated proportion of computers in the population that need warranty service based on the observed proportion in the sample?"
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A sphere has a diameter of 14 units. what is the volume of the sphere in cubic units ? If a cylinder have the same radius as the spear and a height of 14 units what is the volume of the cylinder
Answer:
Therefore, the volume of sphere is 1436.03 cubic units.
Step-by-step explanation:
V≈1436.76 units cube (sphere)
V=πr^2h (cylinder)
r=7
h=14
V≈2155.13 units cube (cylinder)
8. Glass Garbage Generation A survey found that the American family generates an average of 17.2 pounds of glass garbage each year. Assume the standard deviation of the distribution is 2.5 pounds. Find the probability that the mean of a sample of 55 families will be between 17 and 18 pounds. 0.7135 Source: Michael D. Shook and Robert L. Shook, The Book of Odds. 9. College Costs The mean undergraduate cost for tuition, fees, room, and board for four-year institutions was $26,489 for a recent academic year. Suppose
Answer:
.7147
Step-by-step explanation:
Let P be the probability of 55 families having mean more than 17
P { (17-17.2)/ (2.5/√55) }
P(- 0.5933 )
= - .2765 [ From the z table ]
P be the probability of 55 families having mean less than 18
P { (18 -17.2)/ (2.5/√55) }
P( 2.3732 )
= .9912 [ From the z table ]
Probability of mean between 17 and 18
= .9912 - .2765
= .7147
Which of the following equations could be used to show the relationship between number of days and amount of soda consumed? Select all that apply. Prove your answer is correct using points on the graph.
Answer:
b and e
Step-by-step explanation:
Number of days = x
Amount of soda = y
An equation that can represent the relationship between amount of soda and number of days can be represented in the form of y = mx
Where slope (m) = y/x
Using any point on the line, say (1, 40),
m = 40/1
m = 40
Plug the value of m into y = mx
Thus, we have:
y = 40x
This can also be rewritten as:
y/x = 40
Therefore, the equations that can be used to represent the relationship are:
y = 40x or y/x = 40
A baker owns a small business. He produces bread in bags. Each bag needs 2.6 oz of dough. The baker purchased 10.4 lb of dough. How many bags of bread can be produced?
Answer:
4 bags of bread can be produced
Step-by-step explanation:
Hope this is right I'm still new to all this if not please critique me.
Does this graph represent a function? Why or why not?
Answer:
B. No, because it is not a straight line.
Have a nice day!!!
HELP ASAP I HAVE ONLY A COUPLE MINUTES!!!!!
Adela, Tony, Pang, and Ruben are all in 6th grade. Their average age is 11 years old. The list shows the difference from average for each.
Age Difference
Adela: 0.75 year
Tony: 11
10
years
Pang: –0.8 year
Ruben: -1
2
year
Which lists shows the values of the differences ordered from least to greatest?
Adela, Tony, Pang, Ruben
Adela, Pang, Ruben, Tony
Pang, Ruben, Adela, Tony
Tony, Adela, Ruben, Pang
Answer:
I think it would be the second one or last one
Answer:
Pang, Ruben, Adela, and Tony is the correct answer
Step-by-step explanation:
You're welcome~
How many births occur among women under the age of 20?
Answer:
what do you mean?
Step-by-step explanation:
If f(x)=9−4 |x+1|, find f(−5). −15 −7 7 23
Answer:
If f(x) = 9–4 |+1|, find f(-5)?
Step-by-step explanation:
15
-7
7
23
ANSWER 23
The value of function f (- 5) will be;
⇒ f (-5) = - 7
What is substitution method?
To find the value of any one of the variables from one equation in terms of the other variable is called the substitution method.
Given that;
The function is,
⇒ f (x) = 9 - 4 |x + 1|
Now,
The function is,
⇒ f (x) = 9 - 4 |x + 1|
Substitute x = - 5, we get;
⇒ f (-5) = 9 - 4 |- 5 + 1|
⇒ f (-5) = 9 - 4 |- 4|
⇒ f (-5) = 9 - 4 × 4
⇒ f (-5) = 9 - 16
⇒ f (-5) = - 7
Thus, The value of function f (- 5) will be;
⇒ f (-5) = - 7
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State sales tax went from 5% to 5.5%. Calculate the absolute increase and the relative increase in sales tax.
Since all values shown are percentages, it may help to replace the % symbol with the word "percent" and treat it as a label (like dollars or pounds). It is not necessary to
convert the percentages into decimals before performing calculations with them.
Recall that when absolute change of percentages is calculated, a specific unit is required for the result.
The absolute increase is
-Select-
The percentage increase is
-Select-
Dominique says that the state sales tax increase is really bad because it's a 10% increase. Shawn says that the state sales tax increase is not too bad because it's just a
one-half percentage point increase. Who's right?
O Shawn only
O Dominique only
O Both
O Neither
What is the GCF of 6x^2
+ 12x?
Answer:
6x
Step-by-step explanation:
first you have to find the GCF of 6 and 12 then th GCF of
[tex] {x}^{2} and \: x[/tex]
finally
6x
if its helpful ❤❤
THANK YOU
whats half of 30 i need a answer
Answer:
15
Step-by-step explanation:
you divide 30 by 2
Half of 30 is 15.
To calculate half of 30, we divide 30 by 2 since "half" means dividing something into two equal parts.
Dividing 30 by 2, we get:
30 ÷ 2 = 15.
Hence, half of 30 is equal to 15.
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X
X
What is the value of x
Answer:
2x..................
Thomas invests $50,000 in an account that compounds interest continuously and earns 15%. How long will it take for his money to triple? Round to the nearest tenth of a year.
Answer:
7.3 years
Step-by-step explanation:
Simplify the expression by removing symbols of grouping and combining like terms.
3(r − 4s) − 5(3r − 5s)
Step-by-step explanation:
the answer is -12r+13s
if u need the explanation I gotchuu just lemme know or need work shown
hope it helps<33
