Mathematics Middle School

Qual é o perímetro de um quadrado de 3,8 cm de lado ?E sua área?

Answers

Answer 1
I don't know what language your speaking, but I do know it's a Latin language. So I understand a bit since I speak Spanish (another Latin language)

Para encontrar el perímetro tienes que anadir 3.8, 4 veces o mulltiplicar por 4
3.8 + 3.8 + 3.8 + 3.8 = 15.2
3.8 x 4 = 15.2
15.2 es tu respuesta

Para encontrar el area multiplica 3.8 por 3.8
3.8 x 3.8 = 14.44
14.44 es tu area

Related Questions

Please help me 4and 5

Answers

what grade are you in

Five years ago the population of Australia was 23.13 million. It has grown by 870 000. What is the population of Australia now?

Answers

23,130,000 + 870,000 = 24,000,000

The current population of Australia is 24 million.

It is given to us that the initial population was 23.13 million and the population 5 year later has grown by 870000 or 0.87 million. Thus to find the current population we simply need to add the initial population and the growth that has happened in 5 years. This gives us:

[tex]Current\ population = 23.13\ million + 0.87\ million = 24\ million[/tex]

Thus, the current population of Australia is 24 million.

A recipe calls for 1/4 teaspoon of shortening for every 2/3 cup of milk. What is the unit rate of cups per teaspoon? Explain

Answers

This is the rate per 1/4 of a teaspoon. 
To find the rate for a whole teaspoon, multiply 2/3 by 4 to get 8/3, or 2 2/3.
So, the rate is 2 2/3 cups of shortening per teaspoon. 
Hope this helps!

S = √3*73.5 /4.5=7 (Khufu’s pyramid)

The volume of Khafre’s pyramid is about 9/10 the volume of Khufu’s pyramid. If Kristina wants to make the second model pyramid so its volume is 9/10 the volume of the first model pyramid, what volume should she make the second model pyramid?

This goes with the other questions! if you need information i can get that for you!
Also, could you work it out!

Answers

3/6 should b you answer answer

Final answer:

The  volume will be of 6.3 for the second model.

Explanation:

The student is asked to calculate the volume of the second model pyramid, Khafre's pyramid, which is 9/10 the volume of the first model, Khufu's pyramid. The student has already calculated that, for Khufu's pyramid, S = √3*73.5​/4.5=7. To find the volume Kristina should make the second model, we simply multiply the volume of the first model by 9/10.

Although the question does not provide the exact volume of the first model, we will assume the value of S given is the volume of Khufu's pyramid model. Therefore, the volume of Khafre's pyramid model should be 7 * (9/10) = 6.3.

This result is based on the proportion given between the two pyramids' volumes and is a straightforward calculation of this proportion.

Which relationship between x and y in the equation shows a proportional relationship y=12x y=12/x y=2x+6 y=x/2+3

Answers

y = 12x . . . is a proportional relationship

_____
y = 12/x is an inverse relationship

y = 2x+6
y = x/2 +3 are both linear relationships, but not proportional relationships.

i really need help. thanks

Answers

Break the parking lot into different polygons that you can easily find the area of. Then find the add all the areas of the diagram and multiply by  75 to get the amount of money needed.

Natalie worked during the summer for 12 weeks at an amusement park. She earned a salary and put 30% of her earnings into savings. At the end of the summer, her savings were a total of $486. How much was she paid every month (4 weeks)? Help please

Answers

486/3=162
162/3=54
54x10=540

$540 every 4 weeks

Alison is currently three times as old as Mike. 5 years ago, Alison was eight times as old as Mike. How old is Alison now?

Answers

21 because first of all let’s start with the fact that 5 years ago a was 8m. Let’s substitute 1 for m if m was one, a would be 8 (five years ago) both add 5, but 13 would not be 3 times older than 6. Let’s then substitute m for 2. Then a would be 16 because 8*2 equals 16. Both add 5 and you get 21 and 7. 21 is 3 time more than 7.

A probability experiment is conducted wich of these can not be considered a probability of an outcome: a) 0.222 b) 8.2% c) 0.0234 d) 122.96% e) 5/3 f) 0.45%

Answers

Probability can only range from 0 to 1 and d) 122.96% and e) 5/3 is bigger than 1 so the answer would be d and e.

122.96% and 5/3 cannot be considered probabilities of outcomes in a probability experiment because they are greater than 1. Correct option is d and e.

In probability, the probability of an outcome must be a value between 0 and 1, inclusive. Therefore, any value less than 0 or greater than 1 cannot be considered a probability of an outcome.

Let's check each option:

a) 0.222 - This is a valid probability since it is between 0 and 1.

b) 8.2% - This can be converted to a decimal as 0.082, which is a valid probability since it is between 0 and 1.

c) 0.0234 - This is a valid probability since it is between 0 and 1.

d) 122.96% - This can be converted to a decimal as 1.2296, which is not a valid probability since it is greater than 1.

e) 5/3 - This can be simplified to approximately 1.6667, which is not a valid probability since it is greater than 1.

f) 0.45% - This can be converted to a decimal as 0.0045, which is a valid probability since it is between 0 and 1.

Therefore, options (d) 122.96% and (e) 5/3 cannot be considered probabilities of outcomes in a probability experiment because they are greater than 1. The other options are valid probabilities as they fall within the range of 0 to 1, inclusive.

To know more about probability:

https://brainly.com/question/29262621

#SPJ2

What is the value of x^2 + 4 for x = 5?

Answers

x^2 + 4 = 5^2 + 4 = 25 + 4 = 29

if g(x) equals 4x + 5, which statement is true? Select the correct answer.

Answers

Hey l need summ more info just email me and we can get this done

Roger served 5/8 pound of cracker wich was 2/3 of the entire box what was the weight of the crackers originally in the box

Answers

Answer:
original weight of the box = 15 / 16 pounds

Explanation:
Assume that the original amount in the box is x.
We are given that:
5/8 pounds represent 2/3 of the total amount (x).
This can be translated into the following equation:
(2/3) x = 5 / 8

Now, we will solve for x as follows:
(2/3) x = 5 / 8
Multiply both sides by 24 to get rid of the denominators as follows:
(2/3) x * 24 = (5 / 8) * 24
16 x = 15
Divide both sides by 16 to isolate the x as follows:
x = 15 / 16 pounds

Hope this helps :)

The original weight of the crackers in the box is 15/16 pound.

The question asks us to determine the original weight of a box of crackers, given that 5/8 pound of crackers was served, which was 2/3 of the entire box.

We can set up the proportion by stating that 5/8 pound represents 2/3 of the whole, so let's represent the total weight of the crackers with the variable 'w'. The equation to represent this situation is (5/8) pound = (2/3) * w.

To solve for 'w', we'll multiply both sides of the equation by the reciprocal of 2/3, which is 3/2:

(5/8) * (3/2) = w

Simplifying this equation gives us the total weight:

(5 * 3) / (8 * 2) = w

15 / 16 = w

w = 15/16 pound, which is the original weight of the crackers in the box.

Helppp!!!! I’m not sure what this is...

Answers

The near and far faces appear to be trapezoids, with bases 12 in and 8 in and height 8 in. Hence each of them has an area
.. Atrapezoid = (1/2)(b1 +b2)h
.. = (1/2)(12 in + 8 in)*(8 in)
.. = 80 in^2

The remaining faces unroll into a rectangle 8 in wide and (12 +8 +8+9) in long. The area of a rectangle is the product of its length and width.
.. Arectangle = length*width
.. = (37 in)*(8 in) = 296 in^2

The total surface area is the sum of the rectangle area and the two trapezoidal faces.
.. Atotal = Arectangle + 2*Atrapezoid
.. = 296 in^2 +2*80 in^2
.. = 456 in^2

The 1st selection is appropriate.

Must a decimal divisor and a decimal dividend have the same number of decimal places in order to have a whole number quotient? write a division equation using two decimal numbers to support your answer.

Answers

Asked and answered elsewhere.
https://brainly.com/question/9153852

Joel is looking at costs for using a gym. He could pay $50 per month for unlimited use or he could pay $12 per month plus $4 per visit. How many visits would he have to make each month to make the $50 per month unlimited use option the cheapest one?

Answers


[tex]y = 4x + 12[/tex]
Joel would have to go at least 10 times per month to make the 50 dollars per month the cheapest one.

Answer:

First choice is cheaper.

Step-by-step explanation:

Joel could pay $50 per month for unlimited use or he could pay $12 per month plus $4 per visit.

Let the monthly visits be x

We can define this as :

[tex]12+4x> 50[/tex]

[tex]4x >50-12[/tex]

[tex]4x >38[/tex]

[tex]x> 9.5[/tex]

So, x can be greater than 9.5 means 10.

[tex]4(10)+12>50[/tex]

[tex]52 > 50[/tex]

Comparing both we can say that the first choice is cheaper.

write the rule for the pattern 1,5,9,13,17

Answers

An increase by four.
The rule is of this problem here is +4

Madeline sold $167 worth of items at a garage sale and then received her $232 paycheck. Estimate how much money she now has by rounding to the nearest ten first and then adding the rounded numbers.

Answers

the answer is 60 dollars

Madeline has approximately $400 after rounding her garage sale earnings and paycheck to the nearest ten and adding them together.

The question involves estimating the total amount of money Madeline has after selling items at a garage sale and receiving her paycheck. To estimate the total amount, we need to round each amount to the nearest ten and then add the rounded numbers together.

First, round $167 to the nearest ten, which is $170.

Next, round $232 to the nearest ten, which is $230.

Finally, add the rounded numbers: $170 + $230 = $400.

all books in a store are being discounted by 30 percent

part a: let x represent the regular price of any book in the store.write an equation that can be used to find the sale price of any book in the store.

Jerome bought a book on sale at the store. the sale price of the book was $ 8.96.

part b: solve the equation to find the regular price of the book to the nearest cent.

Answers

okay, I'm not sure if I'm understanding this right but I think the equation to find the sale price would be x-30%.

The regular price of $8.96 should be 11.65.

Find the area of the trapezoid.
A) 38.75 in2
B) 77.5 in2
C) 155 in2
D) 198 in2

Answers

Hey there!

To solve this add the two lengths. . .

22 + 9 = 31

Multiply the height and the total. . .

31 x 5 = 155

Divide 155 and 2 . . .

155 divided by 2 = 77.5 <------

The correct answer to your question is option B.

Hope this helps you.
Have a great day!

Answer: The answer is b) 77.5

Step-by-step explanation:

hope i helped

The sum of Emil’s and Rosa’s ages is 27 years. Nine years ago Emil was twice as old
as Rosa was then. How old is each person?

Answers

e + r = 27;
e - 9 = 2 x ( r - 9 );
So, e = 27 - r;
Then, 27 -r - 9 = 2r - 18;
18 - r = 2r - 18;
18 + 18 = 2r + r;
36 = 3r
Finally, r = 12 years (Rosa);
e = 27 - 12;
e = 15 years (Emil);

Harry's Health club costs $20 per month plus a $75 membership fee. Fiona's fitness costs $35 per month. What is the dollar amount at the break even point?

Answers

Answer: The break even point is after 5 months.

First, we need to set up an equation for each plan.

Harry's Health Club can be y = 20x + 75 because it starts at 75 and increase 20 per month.

Fiona's Fitness can be just y = 35x because it is just 35 per month.

Set the equation equal to each other and solve.

20x + 75 = 35x 
75 = 15x
5 = x

a circular rug is 6 feet in diameter. binding for the edge costs $1.50 per yard. what will it cost to bind the rug? justify your answer

Answers

C = circumference or perimeter of circle

d = diameter length

C = πd

How many yards in 6 feet?

1 yard = 3 feet

So, 2 yards = 6 feet

C = π(2 yards)

C = 2π yards

Each yard is $1.50.

So, what do you think we do next?

Can you finish?

What is the solution to the system of equations?

3x - 4y= 16
2x + 3y=5

A. (-4,1)
B. (4,-1)
C.(-4,-1)
D.(4,1)

Answers

The answer is B: (4, -1). You can find this answer if you plug the two numbers in yourself.

Hope this helps!

Answer:

B: (4, –1)

Step-by-step explanation:

Someone please help

Answers

24/6 =4
9-6 = 3
 answer would be 4k^3

A square pyramid and a cube have the same volume if the length of each side of the base of the square pyramid is 2 cm in the height of the cube is 4 cm what is the height of the pyramid

a 8cm
b 16cm
c 24cm
d 48 cm

Answers

Vol sq. pyramid = 1/3×s^2×h
Vol cube = s^3
since height of cube is 4, that height = s
V = (4)^3 = 64 cubic cm
now since their Vs are the same,
1/3×s^2×h = 64
they said length of side in square pyramid
was 2, then:
1/3×(2)^2×h = 64
1/3×4×h = 64
4/3 h = 64
h = 64×3/4 = 16×3 = 48 cm

D) is the correct answer

find the separate equations form the lins represented by 3x^2 + 10xy + 8y^2 + 14x + 22y + 15

Answers

3x^2 + 10xy + 8y^2 + 14x + 22y + 15 = 0

3x^2 is factorable only as 3x and x.
15 can be 15 * 1 or 3 * 5.
As a first guess, I place 5 and 3 in that order.
The coefficients of y are unknown so far.

= (3x + Ay + 5)(x + By + 3)

= 3x^2 + 3Bxy + 9x + Axy + ABy^2 + 3Ay + 5x + 5By + 15

(3B + A)xy = 10xy

(3A + 5B)y = 22y

  A + 3B = 10
3A + 5B = 22

-3A - 9B = -30
3A + 5B = 22

4B = 8

B = 2

A + 3B = 10

A + 6 = 10

A = 4


3x^2 + 10xy + 8y^2 + 14x + 22y + 15 = (3x + 4y + 5)(x + 2y + 3)

The product of (3x + 4y + 5)(x + 2y + 3) is indeed
3x^2 + 10xy + 8y^2 + 14x + 22y + 15


The lines are
3x + 4y + 5 = 0
x + 2y + 3 = 0



look.. this is my question dat ur helping meh wit..

sorry.. I didn't know where else to send dis...(+_+)


PLEASE HELP QUICK
Which question can best be answered by finding the volume of a figure?

A)How much gas is needed to fill a gas tank?

B)How much wrapping paper is needed to cover a prism?

C)How much wood is needed to frame a window?

D)How much material is needed to line a garden with a sheet of weed-blocking material?

Answers

A should be the correct answer

The correct answer is A

Hope this helps

~ Jordan ~

His train has been running for 2 1/2 Days straight at a constant speed of 4.8 mph. How far has he traveled?

Answers

288 miles in 60 hours

I need to know the area of the shape base 1 (27ft) base 2(34ft) Height (12ft)

Answers

Perhaps you've seen the formula
.. A = (1/2)*(b₁ +b₂)h

Use it.
.. A = (1/2)*(27 ft +34 ft)*(12 ft)
.. = (1/2)*(61 ft)*(12 ft)
.. = (30.5 ft)*(12 ft)
.. = 366 ft²

PLZ HELP!!!!!! (WILL GIVE BRAINLIEST!!!!)


Answers

You can use feet or inches because they are both on the diagram and they are both a part of the same measuring system. If you use inches, you would be using larger numbers, but if you used feet, you would be using fractions.
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