Mathematics Middle School

PLEASE HELP ME!!! Will mark brainliest

a) A two-digit number is 18 more than that number reversed. What could that number be? List all possibilities.

b) The sum of digits in a two-digit number is 14. If you double the reversed number and add the result to the original number, the sum would be 222. Find the original number.

c) The sum of the digits of an odd 2-digit number is 17. What is the number?

Answers

Answer 1

C is 89 but I haven’t figured out the rest yet sorry

Answer 2

A. 13 and 31; 35 and 53; 46 and 64; 68 and 86; 79 and 97
B. 86
C. 89

Related Questions

for which data representation is the median the better measure of center

Answers

You should use a median as a measure of center when you have data that is not distributed evenly. For example, if you have a number that is a lot bigger or smaller than most of the numbers, using the mean would be a better way to show one value to represent the information. When representing data on a line/dot plot or a histogram, you should use the median to represent the data if it is skewed left or right. This means it looks longer on one side or when looking at the middle, it does not look the same on both sides (symetric).

The median is the better measure of center when dealing with data sets that have outliers or extreme values.

The median is the better measure of center when a data set contains several outliers or extreme values. It is less sensitive to measurements with extreme values, providing a more robust estimation of central tendency. The median can be thought of as the middle number in a series, where 50% of the measurements are above it and 50% are below.

I would rather to help 6th and 7th grade math

Answers

Do you need help or are you saying you'd help?

107=5x+17 simplify your answer as much as possible

Answers

107-7=90
90divided 5=18
18*5=90+17=107
I did the work ♥♥♥♥

x=18
5*18=90
90+17=107

Greg started with a certain number of quarters. He then decided on a number of quarters he would save each day. He added the quarters he saved to the amount with which he started. At the end of day 2, Greg had a total of 26 quarters saved. At the end of day 5, he had a total of 35 quarters saved.

A. How many quarters does Greg start with? Show or explain your work.

B. Write an equation to model the number of quarters Greg has saved, y, after x days.

C. Using the rate at which Greg is saving, explain why he can never have exactly 100 quarters saved by the end of any given day.

Answers

Final answer:

Greg started with 20 quarters. The equation for the number of quarters saved after x days is y = 20 + 3x. With Greg's savings rate of 3 quarters per day, he cannot have exactly 100 quarters on any day since 100 is not a multiple of 3 plus the 20 starting quarters.

Explanation:

To determine how many quarters Greg started with, let 's' be the number quarters Greg started with, and 'd' be the number of quarters he saves each day. After 2 days, he had a total of 26 quarters saved, and after 5 days, he had a total of 35 quarters saved. These can be written as two equations:

s + 2d = 26s + 5d = 35

Subtracting the first equation from the second gives:

3d = 9

From which we find that d = 3 (Greg saves 3 quarters a day). Plugging this value back into the first equation:

s + 2(3) = 26

s + 6 = 26

s = 20

Greg started with 20 quarters.

B. The equation to model the number of quarters Greg has saved, y, after x days is:

y = 20 + 3x

C. With the savings rate of 3 quarters a day, Greg's total will always be a multiple of 3 plus the 20 he started with. 100 is not a multiple of 3, meaning he can never save exactly 100 quarters by the end of any given day since 100 minus the 20 quarters he started with leaves 80, which is not divisible by 3.

Final answer:

Greg started with 20 quarters and saves 3 quarters every day afterward. The equation to model the number of quarters saved after x days is y = 20 + 3x. It is impossible for Greg to have exactly 100 quarters saved by the end of any given day because 100 cannot be reached by adding multiples of 3 to the starting amount of 20 quarters.

Explanation:

To solve for the number of quarters Greg started with and the number of quarters he saves each day, we can set up a system of equations. Let's designate q as the number of quarters Greg started with and d as the number of quarters he saves each day. From the problem, we have two points of data: On day 2, Greg has 26 quarters, and on day 5, he has 35 quarters.

The equations representing these two data points are:

q + 2d = 26q + 5d = 35

Subtracting the first equation from the second gives us:

3d = 9

Dividing both sides by 3 gives us:

d = 3

Now that we have the value for d, we can substitute it back into the first equation:

q + 2(3) = 26

q + 6 = 26

Subtracting 6 from both sides gives us:

q = 20

Greg started with 20 quarters.

For the equation to model the number of quarters saved, y, after x days, we have:

y = q + dx

This simplifies to:

y = 20 + 3x

To address part C, let's analyze the possibility of Greg having exactly 100 quarters saved. If we set y to 100 in the equation y = 20 + 3x and solve for x, we get:

100 = 20 + 3x

80 = 3x

x = 80/3

x ≈ 26.67

Since x must be an integer because Greg cannot save a fraction of a day, he cannot have exactly 100 quarters by the end of any given day. This is because 100 is not a multiple of 3 (the daily amount Greg saves) when starting from 20. Thus, it's impossible for Greg to have exactly 100 quarters saved by the end of any given day.

Double a penny every day for 30 days. How many dollars do you have

Answers

$10, 737, 418.24 after 30 days

2x30=60
If I have this correct it is just 2 pennies which is each one cent multiplied by 30

BRAINLIEST if right!
A cone has a diameter of 9 inches and a height of 12 inches. Find the volume of the cone to the nearest cubic inch.

972 in³

113 in³

324 in³

254 in³

Answers

v = PI x r^2 x h/3

v = 3.14 x 4.5^2 x 12/3
v = 3.14 x 20.25 x 4
v = 254.34

Answer = 254 in^3

What is the square root of 25p^3 expressed in simplified form?

Answers

5p square root of p^2

A sign in front of a roller coaster says ''you must be 40 inches tall to ride'' what percentage of this height is A 34 inches and B 54 inches. Please answer both questions if you can.

Answers

Percentage of A
34/40 x 100 = 85%

Percentage of B
54/40 x 100 = 135%

Ans: A) 85% B) 135%

estimate the value of this expression by rounding each number to the nearest

whole unit. (1.94)(7.51)(3.74)

A. 21

B. 42

C. 56

D.64

Answers

Hi there!

First, we need to round each number to the nearest whole unit:

1.94 ≈ 2
7.51 ≈ 8
3.74 ≈ 4

Now, we multiply:

2 * 8 * 4 = 64

So, our answer is D.

Hope this helps!

Please help meeeeeeeee

Answers

Since the diameter is twice the radius, the diameter is 44.

2*22=44

:) I hope this helps!

2 x 22 = 44 Thad ur answer

△ABC is similar to △DEF .

AB=5 inches, BC=9 inches, and DE=7.5 inches.

What is EF ?

Answers

Similar triangles have corresponding sides with proportional lengths.

AB/BC = DE/EF

5/9 = 7.5/EF

5(EF) = 9 * 7.5

5(EF) = 67.5

EF = 13.5

I think the answer is 13.5. △DEF is 1.5 times bigger than △ABC

When a number x is multiplied by 5, it gives the same result as when 48 are added to twice the number. Form an equation in terms of x. Hence, find the number x

Answers

5x=48+2x
-2x. -2x
3x=48
3. 3
x=16

what is the answer to this question ?

Answers

If there is a really short way of doing this, I don't see it. The only way I know to do it is to find the third angle of both triangles.

So for F the third angle for each of the pairs is
left side: 180 - (51 + 30) = 180 - 81 = 99
right side: 180 - (109 + 30) = 180 - 139 = 41
This is not the answer.

G
180 - (92 + 70) = 180 - 162 = 18
180 - (28 + 70) = 180 - 98 = 82
This is not the answer either.

H
180- (58 + 30) = 180 - (88) = 92
180 - (90 + 58) = 180 - 148 = 32
Not at all.

180 - (35 + 82) = 180 - 117 = 63
180 - (82 + 63) = 180 - 145 = 35
This pair has a third angle that is equal to the other triangle's pair. This is your answer.

what she got to school she saw that the school has nine buildings each Heaven 30 classrooms how many classrooms does the school have

Answers

Just do 9*30 which is 270 classrooms

Final answer:

To find the total number of classrooms in the school, we multiply the number of buildings (9) by the number of classrooms in each building (30), resulting in a total of 270 classrooms.

Explanation:

The question asks how many classrooms are there in total if a school has nine buildings, each with 30 classrooms. To find the answer, we need to multiply the number of buildings by the number of classrooms in each building. This calculation is straightforward:

Multiply the number of buildings (9) by the number of classrooms in each building (30).

This gives us: 9 buildings x 30 classrooms/building = 270 classrooms in total.

Therefore, the school has a total of 270 classrooms.

whats a prime number

Answers

24 maybe because 24 is a even number so it has to be 24 as the answer

Hi there!

A prime number is a number that can't be divided by any whole number but one.

For example, 3, 7, 11, and 29 are prime numbers because they can't be divided by a whole number (excluding 1).

Hope this helps!

What is the average speed in miles per hour of a car that’s travels 956.4 miles in 15.9 hours? Round the answer to nearest tenth , explain step by step how to solve it

Answers

956.4 / 15.9 = 60.1509434
rounded = 60.2

Why do elephants have ivory tusks?

Answers

Cause god made it that way lol

Elephants have ivory tusks, which are elongated incisor teeth, primarily for digging, stripping bark, and defense, and they may have evolved for sexual selection and competitive interactions among males.

Elephants have ivory tusks because they are actually elongated incisor teeth. These tusks are composed of dentine and are covered by a layer of enamel, just like our teeth. Elephants use their tusks for various purposes, such as digging for water, stripping bark from trees, and as a weapon for defense. However, the primary reason they have tusks is not entirely understood. It's believed that tusks might have evolved for sexual selection and display, as well as for competitive interactions among male elephants.

What is the circumference of the circle? Round your answer to the nearest foot

Answers

it would be 78.5 because if you do the work for example here is work i did for a question on my quiz

Where "C" is circumference and "d" is diameter.

Substituting your values in, we have:

Which, when rounded, is 37.7.
thats my work but when you do your work for your question you get 78.58 and you would round to the nearset tenth and you get 78.5

Hope this helps:) please mark branliest would really apperciate it thx

It takes 24 cups of chicken broth to make chicken soup recipe. How much is this in quarts?

Answers

6.25 quarts. this should be correct and i hope it helps

it should be 6 quarts. :)

I need help figuring out when to use law of sine or law of cosine?
These are some examples of problems.
Please Help!

Answers

when you have angle and its corresponding (opposite) side then you need to use law of sin. Problems 3,4,5(in 5 you need at first find angle X=180-92-62)

when you have two sides and angle between them, this is law of cos, problem 6,8

problem 7 you can use both, but if you can use both better to use law of sin, it is just easier

Final answer:

Use the law of sines when you have two angles and one side, or two sides and a non-inclusive angle. Use the law of cosines when you have two sides and the included angle or all three sides. Apply trigonometric identities for vector addition and resolving forces.

Explanation:

Deciding when to use the law of sines or the law of cosines depends on the information given in a triangle problem. The law of sines is most useful when you know either two angles and one side (AAS or ASA) or two sides and a non-enclosed angle (SSA). The law states that the ratio of the length of a side to the sine of its opposing angle is consistent for all sides and angles in a triangle, often written as a/sin A = b/sin B = c/sin C.

The law of cosines is handy when you have either two sides and the included angle (SAS) or when you have all three sides (SSS). This law relates the lengths of the sides of a triangle to the cosine of one of its angles, following the formula c² = a² + b² - 2ab cos C.

For vector addition problems or when decomposing forces into components, trigonometric identities involving sine and cosine are employed. If you're resolving a weight into components, you may use sine to find the component opposite the angle and cosine for the component adjacent to the angle.

Smoked salmon is being sold for $15.50 per pound. What is the cost of 6 ounces of salmon?.

Answers

1 pound = 16 ounces

15.50 / 16 = 0.96875 per ounce

0.96875 * 6 = $5.81

is 2x-5y=0 a direct variation

Answers

Is 2x-5y=0 a direct variation

Answer: Yes

what value of c makes x^2 - 24x + c a perfect square trinomial?

Answers

Divide 24 by two and square it
The answer is 144

Answer:

Step-by-step explanation:

Quadratic equation is given by x²-24x+c

This is in the form expansion of (a-b)², that is a²-2ab+b²

Comparing

a² = x², a = x

-2ab = -24x

-2xb = -24x

b = 12

c = b² = 12² =144

x²-24x+144 = (x-12)²

Option D is the correct answer

What is the total cost or sale price to the nearest cent 20$ haircut; 15% tip

Answers

$20 hai
The answer is $23.00

i need to find the area

there are 3 rectangles and a trapezoid

show how plz

Answers

The area of a rectangle is length x width. We can find the 3 areas of the rectangles with this formula:

20 x 5 = 100
100 yd²

15 x (20-14) = 90
90 yd²

14 x 10 = 140
140 yd²

The area of a trapezoid is 1/2(b1+b2)h
In this problem:

b1=25-15-5
b1=5
b2=10
h=20-14
h=6

We can then plug this into the formula:

A = 1/2(5+10)(6)
A = 1/2(15)(6)
A = 45 yd²

We can then get the area of the whole polygon by adding up the areas of the three rectangles and trapezoid:

A = 100+90+140 + 45
A = 375 yd²

HELP ASAP!!!

1: What is the surface area of a sphere with a radius of 4 meters rounded to the nearest square meter
A: 50 m^2
B: 101 m^2
C: 201 m^2
D: 268 m^2

2: What is the volume of a sphere with a radius of 6 meters rounded to the nearest square meter?
A: 905 m^3
B: 679 m^3
C: 452 m^3
D: 226 m^3

Answers

Q1)
the surface area of the sphere can be calculated using the following equation
Area = 4πr²
where r = radius
π = 3.142
radius of the sphere = 4 m
substituting radius in the area equation
Area = 4 x 3.142 x 4²
= 201.08 m²
when rounded off to nearest sq.meter , 201.08 ≈ 201
answer is C. 201 m²

Q2)
volume of the sphere can be calculated from the following equation
V = 4/3 πr³
radius of sphere = 6 m
π = 3.142
V = 4/3 x 3.142 x 6³
= 904.8 m³
rounded off to nearest sq. meter
904.8 ≈ 905 m³
correct answer is A

i need this rotated 270 degrees clockwise

Answers

270° CW is the same as 90° CCW. The mapping for that is (x, y) ⇒ (-y, x).

D(1, 2) ⇒ D'(-2, 1)
F(2, 3) ⇒ F'(-3, 2)
G(4, 1) ⇒ G'(-1, 4)

Convert 3 feet to inches.
A) 4 inches
B) 9 inches
C) 12 inches
D) 36 inches

Answers

1 foot = 12 inches
3 feet x 12 inches = 36 inches

answer is D

In every foot, there’s 12 inches. Since there are 3 feet, there are three 12 inches. We have to multiply 3 by 12 to find the total amount of inches.
3•12=36
D), there are 36 inches in 3 feet.

A right triangle is drawn on a coordinate plane. Two vertices of the triangle are points A(−2,4) and B(3,−2) . The third vertex of the triangle is point C, which lies in the third quadrant of the coordinate plane.

What is the distance from point A to point C?

Enter your answer in the box

Answers

As you can see in the image, point C must be (-2, -2), because it is the only point that will create a right triangle that is in the third quadrant.

To find the distance between point A and point C, just subtract the y-values.

[tex]\sf 4-(-2)=\boxed{\sf 6}[/tex]

PLEASE HELP ME!! A right circular cone has a radius of 6 inches and a volume of 180 cubic inches. What is the height of the cone? Please answer without using pi. Thank you

A. 5 in.
B. 15 in.
C. 25 in.
D. 90 in.

Answers

Volume of the cone = [tex] \frac{1}{3} \pi x^{2} h[/tex]

Given that the volume is 180 cubic inches
[tex] \frac{1}{3} \pi r^{2} h[/tex] = [tex]180[/tex]

Given that the radius is 6m
[tex] \frac{1}{3} \pi 6^{2} h[/tex] = [tex]180[/tex]

Evaluate
[tex] \frac{1}{3} \pi (36) h[/tex] =  [tex]180[/tex]
[tex] 12\pi h[/tex] =  [tex]180[/tex]
[tex] h[/tex] =  [tex]180[/tex] ÷ ([tex] 12 \pi [/tex])
[tex] h[/tex] = 4.77  ≈ 5 inches (Answer A)

Option B.The height of a cone is 15 inches.

To find the height of the cone, we will use the formula for the volume of a cone:

V = (1/3) * π * r² * h

We know the volume (V) is 180 cubic inches and the radius (r) is 6 inches.
We need to solve for the height (h).
First, let's plug in the known values:

180 = (1/3) * π * (6)² * h

180 = (1/3) * π * 36 * h

540 = π * 36 * h

540 / 36π = h

We can simplify this further, h = 15/π. Since we do not use π for the answer:

By rational observation of given options, B. 15 in. seems accurate.

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23 POINTS PLZ HELP HURRY BEING TIMED FASTS ONE TO ANSWER GET BRAINLY!!panda population are adopted to live in which kind of habitat/A. Rain forestB. Cherry Forest C. Bamboo forest D. Ginkgo forest according to riis how did the rise of civilization lead to slums Mark each statement if it was a source of conflict between Christians and Roman rulers during the third century a.d. What is the strongest thesis for an essay on public transportation A: Public transportation is beneficial to individuals and the community for many reasons. B: Economic gain, less stress, and more time are just a few of the wonderful benefits of public transportation. C: taking public transportation can be benefit a person financially, create new social connections, and reduce stress. D: Public transportation is a good thing for many reasons and for many people in our city. Please need help still lost on this Why did a break-in at the Watergate office building turn into a major political scandal?1.The Democrats were the party in power in Congress and they wanted to remove Nixon.2.The cover-up involved criminal activities and obstruction of justice by the President of the United States3.The press was opposed to Nixon's policies, so Woodward and Bernstein wrote an expose' of his behavior. What is the volume of a square pyramid with a base length of 6cm and a height of 9cm? both campbell and sophie took ___ toys for show and tell does the author succed in persuading you to accept his argument? What are the Advantages and Disadvantages of Data Back Up? 58. Which of the following statements about Woodrow Wilson is true? How does the imagery in this excerpt create a tone that will encourage the listeners not to kill Leopold and Loeb?both these boys at a time seeking to adjust their young lives to the world, moved by the strongest feelings and passions that have ever moved men, both these boys at the time boys grow insane, at the time crimes are committed, all this added to all the rest of the vagaries do you charge them with the responsibility that we may have a hanging, that we may deck Chicago in a holiday garb and let the people have their fill of blood, that you may put stains upon the heart of every man, woman and child on that day and that the dead walls of Chicago will tell the story of blood? The imagery creates a celebratory tone; Darrow wants the audience to imagine how happy Leopold and Loeb will be when they are set free. The imagery creates a nostalgic, even sentimental tone, designed to remind the audience of their own teenage years and experiences. The imagery creates a bloodthirsty, violent tone intended to turn the audience against the death penalty. The imagery creates a scolding, judgmental tone; Darrow wants to reassure the audience that Loeb and Leopold will still suffer the consequences of their crime. Based on what you know of the events of the story The Cask of Amontillado, Fortunatos name in this story is an example of what literary element? A. irony B. characterization C. foreshadowing D. suspense Impaired drivers _____________________________.May experience emotional, societal, financial, legal, and physical consequences that last a lifetimeRarely suffer consequencesRarely affect others in the vehicle or vehicles on the road with themShould drive only in the daylight hours Why did the roman underclass live in cramped apartment buildings? Which protein hormone is produced by the pancreas to promote the increase in the sugar content of the blood by breaking down glycogen in the liver? Identify the number of verbs in the following sentence: "Technical and business writing is something anyone can learn.A. 2B. 1C. 4D. 3 Objects that are too small or too large, events that occur too slowly or too quickly, and processes that are too complicated or too dangerous are most often represented by _______. A. models B. specimen collections C. controlled scientific experiments D. all of these What is the mass of a rock that weighs 49 newtons? Which of the following represents one difference between Baroque and Classical music? A.)In Baroque music, the Mannheim crescendo was popular, while in Classical era music terraced dynamics were popular. B.)In Baroque music, phrasing was continuous, while in Classical era music phrasing was short and based on cadences. C.)Baroque music was simple, while Classical era music was heavily ornamented. D.)Baroque music used the Alberti bass, while Classical era used the figured bass.