Mathematics Middle School

Tony misplaced 7 stamps from his collection. He knows that each stamp of his worth $0.15 and that the total value of them is now only $5.55. write an -EQUATION- to determine the number of stamps (s) that tony originally had.

Answers

Answer 1
44 Stamps. 5.55/0.15 = 37 stamps. 37 + 7 = 44. 44 Stamps.
Answer 2
0.15(s-7)=5.55  divide both sides by 0.15

s-7=37  add 7 to both sides

s=44

So he had 44 stamps originally.

Related Questions

Please answer correct for brainliest

Answers

For trapezoid, the area = (upper base + lower base) * height / 2

So area = (12 + (2*2 + 12) ) *13 / 2 = 182
you will need to find the area of the square in the middle  and than the area of the two triangle which they are the same so only one and then that result multiply it by 2 and added to the area of the square 

Help me with the first question

Answers

Part A) Divide 3 over 18.99 and we get 3/18.99 = 0.15798 approximately. So for this choice, we have roughly a 15.798% discount

Part B) The discount here is 10%. So far, discount A is better

Part C) The discount here is 15%. Discount A is also better because 15.798% is larger than 15%

Part D) Convert 1/4 to decimal form to get 0.25 and then move the decimal point 2 spots to the right to get 25%. So 1/4 = 25%. The discount here is 25%. This discount (of 25%) is much better than discount A.

Store 5 has the best discount since 25% is the largest among all the percentages.

Answer: Choice D)

the height of an object dropped from the top of a 320-meter building is given by h(t)= -5t^2+320. how long will it take the object to hit the ground

Answers

0=320-5t^2
320=5t^2
t^2=64
t^2=8^2
t=8

What is 1 3/4 - 5/6r =8/3

Answers

1 3/4 - 5/6r = 8/3

-5/6r + 7/4 = 8/3

-5/6r +7/4 - 7/4 = 8/3 -7/4
-5/6r = 11/12

(6/-5)*(-5/6r)=(6/-5)*(11/12)
=-11/10

r = -1 1/10

Which property of real numbers is illustrated by the following statement?
6(7x) = (6 ∙ 7)x

Answers

6(7x) = (6 ∙ 7)x

answer
Associative Property of Multiplication

find the value of x below if necessary round to the nearest tenth.
NEED ANSWER PLEASE HELP

Answers

x = 20 x sin(27)

= 9.0798

 rounded to nearest tenth = 9.1

Determine if the graph is symmetric about the x-axis, the y-axis, or the origin. r = 4 cos 3θ. PLEASE HELP ME SOLVE RN I NEED THIS, ALSO INCLUDE THE PROVING PART.

Answers

Symmetry can be determined visually in a graph. If both graphs are mirror-image of each other, then both of the equations are symmetric. But, you can also determine it analytically through testing the symmetry. These are the rules:

If
f(r, θ) = f(r,-θ), symmetric to the polar axis or the x-axis
f(r, θ) = f(-r,θ), symmetric to the y-axis
f(r, θ) = f(-r,-θ), symmetric to the pole or the origin


Test for symmetry about the x-axis
f(r,θ): r=4 cos3θ
f(r,-θ): r = 4 cos3(-θ) ⇒ r = 4 cos3θ
∴The graph is symmetric about the x-axis.

Test for symmetry about the y-axis
f(r,θ): r=4 cos3θ
f(-r,θ): -r = 4 cos3θ
∴The graph is not symmetric about the y-axis.

Test for symmetry about the origin
f(r,θ): r=4 cos3θ
f(-r,-θ): -r = 4 cos3(-θ) ⇒ r = -4 cos3θ
∴The graph is not symmetric about the origin.

Grandma baked 96 cookies and gave them to her grandchildren. One of the grandchildren, Cindy, received 5 fewer cookies than she would have received had all of the cookies been evenly divided among the h grandchildren.
How many cookies did Cindy receive?
Write your answer as an expression.

Answers

If the cookies had been divided equally between the h grandchildren then each grandchild would receive 96/h  cookies.
So Cindy  received (96/h) - 5   cookies
Does not say how many grandchildren. Say n, integer. So, all received some cookies, x, except Cindy, who received 5 less than the even number:

even number= 96/n, Cindy gets 96/n-5, the rest receive the rest of the cookies:

96 - (96/n-5) = 96*(1-1/n) + 5 = 96*(n-1)/n + 5.

Then each of them (n-1) receive the previous number divided by (n-1) -Cindy is not there:

each of the other grandchildren receives:

96/n + 5/(n-1), and Cindy receives 96/n-5, it just needs to be positive.

So any number 'n' which divides 96 and 'n-1' divides 5 works.

Indeed ONLY n=6, makes 5/(6-1) possible.

So there are 6 grandchildren:

5 receive 17 cookies, and Cindy gets 11.

If it were evenly distributed, all would have got 96/6 = 16 cookies.

Now 5 get one more cookie, and Cindy 5 less.

WOW. Very nice problem!! Gonna share it :)


In order for the data in the table to represent a linear function with a rate of change of –8, what must be the value of m?

A. m = 2
B. m = 3
C. m = 19
D. m = 35

Which is the correct answer???

Answers

Answer:  The correct option is (C) 19.

Step-by-step explanation:  We are given to find the value of m so that the data the table to represent a linear function with a rate of change of –8.

We know that

the rate of change for a linear function with two points (a, b) and (c, d) is given by

[tex]R=\dfrac{d-b}{c-a}.[/tex]

From the table, we note that the points (10, 27) and (11, m) satisfy the given linear function.

So, the rate of change of the linear function will be

[tex]R=\dfrac{m-27}{11-10}\\\\\\\Rightarrow -8=\dfrac{m-27}{1}\\\\\Rightarrow -8=m-27\\\\\Rightarrow m=27-8\\\\\Rightarrow m=19.[/tex]

Thus, the required value of m is 19.

Option (C) is CORRECT.

Tim Duncan is shooting free throws. Making or missing free throws doesn't change the probability that he will make his next one, and he makes his free throws 72% of the time. What is the probability of Tim Duncan making all of his next 8 free throw attempts?

Answers

Answer:

Hence, the probability of Tim Duncan making all of his next 8 free throw attempts is:

[tex](\dfrac{18}{25})^8=0.0722204136[/tex]

Step-by-step explanation:

As the probability of one free throw does not depend on the any other i.e. the probability of each throw is independent.

Hence, the probability of making all of his next 8 free throw is calculated as:

Probability of next 8 free throw=Probability of first free throw×probability o f second free throw×··················× Probability of 8th free throw.

i.e. it is given by:

[tex]Probability=\dfrac{72}{100}\times \dfrac{72}{100}\times \dfrac{72}{100}\times \dfrac{72}{100}\times \dfrac{72}{100}\times \dfrac{72}{100}\times \dfrac{72}{100}\times \dfrac{72}{100}\\\\\\Probability=(\dfrac{72}{100})^8\\\\Probability=(\dfrac{18}{25})^8[/tex]

Hence, the probability is:

[tex](\dfrac{18}{25})^8=0.0722204136[/tex]

We have that the he probability of Tim Duncan making all of his next 8 free throw attempts  is mathematically given as

[tex]P=0.72^8[/tex]

From the question we are told

Tim Duncan is shooting free throws. Making or missing free throws doesn't change the probability that he will make his next one, and he makes his free throws 72% of the time. What is the probability of Tim Duncan making all of his next 8 free throw attempts?

Arithmetic

Generally the equation for the  binomial probability is mathematically given as

[tex]P=\frac{n!}{X!(n-X)!}*p^X*(1-p)^{n-X}\\\\Therefore\\\\ P=\frac{8!}{8!(8-8)!}*0.72^8*(1-0.72)^{0}[/tex]

[tex]P=0.72^8[/tex]

For more information on Arithmetic visit

https://brainly.com/question/22568180

If F(x)=8x, which of the following is the inverse of F(x)

Answers

hello :
[tex]f(x) = 8x[/tex]
let : [tex]y=8x[/tex]
so : [tex]x= \frac{1}{8} y[/tex]
the inverse of  [tex]f(x)[/tex] is :  [tex]g(x) = \frac{1}{8} x[/tex]

Answer: answer is F^1(x) = x/8

Step-by-step explanation:

The basement of a large department store features discounted merchandise. Their policy is to reduce the previous month's price of the item by 5 % each month for 6 months, and then give the unsold items to charity. Let Upper S Subscript 6 be the sale price for the sixth month and Upper P the original price. Express Upper S Subscript 6 as a function of Upper P Baseline Number .

Answers

Basically, you are asked to make an equation to represent the sales price after 6 months. But first, let's formulate the general equation. Let S be the sales price after t months, while P is the base price. The equation would be

S = P(1-0.05t)
Simplifying,
S = 0.95Pt

So, after 6 months, the sales price would be:
S₆ = 0.95P(6)
S₆ = 5.7P

solve
18x^2 -3x -10

What is the smallest solution

Answers

Slip and slide method
x^2-3x-180
(x-15)(x+12)
(6x-5)(3x+2)
Using ZPP
6x-5=0
6x=5
x=5/6 <=== one of the roots
3x+2=0
3x=-2
x=-2/3 <==== another root
Final answer: -2/3

1/12 as a decimal. Long division.

Answers

0.08333333333333 would be the answer, and the 3 would keep repeating.

What is the 24% of 40?

Answers

24% of 40.

40 times 0.24 = 9.6

Therefore 24% of 40 = 9.6
Well, the word "of" means, "multiply" (if in case you didn't know)
Anyhow, lets start working out this problem, shall we? 24(40) = ? 24 ÷ 100 = 0.24 0.24 (40) = 9.6 Your answer would be: 9.6

By definition, a rational number is a number q that can be written as a fraction in the form q=a/b where a and b are integers and b≠0. So, 1/3 is rational because it is exactly what you get when you divide one integer by another.Sep 22, 2015

Answers

Numbers are classified in many ways. One of which is that some are classified as rational. These numbers are those whose values can be expressed in terms of the ratio of two numbers. These may be those repeating and non-repeating. There are also irrational numbers which are non-repeating and cannot be expressed as the ratio of two numbers. 

I can't seem to figure it out can someone please help me??

Answers

Start by drawing a line AB, then half way the line, label C, which is the midpoint. Continue to follow the instruction until all labels are in place.

We know that line DC = 16, that means line AD also 16
Line AE = ED = 8
Line EF = FD = 4
Line FG = GD = 2

Line DB = 16+32 = 48
Line DH = 48/2 = 24

Line GH = 2+24 = 26

What is the circumference of a circle with a 7 foot diameter

Answers

To do this, we have to multiply the 7 feet diameter by pi to get the circumference because the formula for circumference is [tex]C = \pi *d[/tex], or circumference = pi times diameter. 7 x 3.14 (pi rounded) = 21.98

Answer: 21.98 feet
Circufmernece=pi times diameter
given that diameter=7ft

circumfernece=7ft times pi
circumfernce=7π ft or aprox 21.98ft

Which of these is the algebraic expression for "some number to the power of 4?"

x4

4x

4x

x + 4

Answers

Answer:

They deserve brainliest!

Step-by-step explanation:

In this exercise we have to identify the formula that is being treated in a written way, so correlating correctly we have:

Letter A

What is power number?

The power is a simplified notation of representing the multiplication of a number, which we call the base, repeatedly by the value of a power that determines how many times we must multiply this number.

So the only one that corresponds to "some number to the power of 4" is:

[tex]x^4[/tex]

See more about power at brainly.com/question/1618040

simplify (4x-4)-3 , pleas help

Answers

12x+12
unless it asks you to factorise again
12(x+1)

hope this helps! Dont forget to put it as the brainliest answer to help me out too xD
Hey, there Jacobbarnes6671! :)

[tex](4x-4)-3[/tex]
Add like terms 
[tex]4x-7[/tex]

This is the furthest you can simplify this expression.

Hope this helps.
-Benjamin

Martina purchased a prepaid phone card for $15.00. Calls cost 5 cents a minute using this card. The credit, C (in dollars), left on the card after it is used for x minutes of calls is given by the following function.

C (x) = 15.00 -0.05x

How much credit is left on the card after Martina uses it for 20 minutes of calls?

Answers

The function is
C(x) = 15.00 - 0.05x

C is how many dollars are left after
x minutes.

So if she uses it for 20 minutes, input that into the x.

C(20) = 15.00 - 0.05(20)
C(20) = 15.00 - 1
C(20) = 14.00


After 20 minutes, there are $14.00 left on the card.

One side of a triangle is 15 inches, and the area of the triangle is 90 sq. inches. Find the area of a similar triangle in which the corresponding side is 9 inches.

Answers

Do the ratio of the two sides. To get the area square the two sides.

(9/15) ratio of sides

(9/15)^2 ratio of areas

81/225

Multiply for the known area

90*(81/225) = 162/5 = 32,4 sq. inches (area of corresponding triangle)

If 10% of a group ate sandwiches two days in a row, and 40% of the group had a sandwich on the first day, this means that 25% of the group that ate a first sandwich had a second. A. True B. False

Answers

The problem can be represented on a Venn diagram, as shown below.

We have P(Day 1 ∩ Day 2) = 0.1 and P(Day 1) = 0.4
We can deduce that 30% of the group ONLY had sandwiches on Day 1 and there's 60% of the group ONLY had sandwiches on Day 2.

We obtain the value 60% = 0.6 from 100%-(10%+30%)=60%

We also can deduce that there 70% of the group that had sandwiches on Day 2

The proportion of people who ate sandwiches on Day 2 GIVEN that they ate sandwiches on Day 1 is given by

P(Day 1 ∩ Day 2)÷P(Day 2) = 0.1÷0.4 = 0.25 = 25%

The statement is TRUE

The range is the set of
A. first coordinates
B. ordered pairs
C. second coordinates

Answers

The range is the set of A. Ordered Pairs


Feel free to ask me more questions on my profile. I am more than happy to help. Don't forget Brainliest! :)
I think the answer is B. Ordered Pairs
:)

In your day-to-day routines, you use math when you go to the grocery store, bank, mall and when cooking. How do you imagine that you will use math in your healthcare career?

Answers

Math would be useful in planning my healthcare because it will help figure out exactly how much money I can invest in different types of healthcare. For example, i will be able to tell if I can afford to pay hospital bills for common illnesses that everyone experiences in their life like colds, broken part of body. etc. , or if I can pay for more expensive procedures and operations.

Anton bought a picnic cooler. His total bill, with tax, was $7.95. He paid 6 percent sales tax. How much did he pay for the cooler alone without tax? The cost of an item is 100% of its price. What number goes in the ? Of the additional problem

Answers

1.00-0.06 = 0.94

7.95 x 0.94 = 7.473, round to 7.47 without the tax

how do you solve for the variable ?? help

Answers

Hello there!

2(3x - 4) + 10 = 5(x + 4)
First, let's distribute 2 to 3x and -4, then 5 to x and 4.
2(3x) + 2(-4) + 10
6x - 8 + 10
6x + 2 is our first half of the equation simplified. Now let's do the other.

5(x + 4)
5(x) + 5(4)
5x + 20 is our second half of the equation simplified. Now let's put them back in their original spots.

6x + 2 = 5x + 20
Get x on one side - subtract 5x from both sides.
x  + 2 = 20
Isolate x by adding 8 to both sides.
x = 18 is our answer.

I hope this helps!

Brenda needs $40 to buy a large box of chocolate. She has saved $12 and plans to work as a babysitter to earn $7 per hour. Which inequality shows the minimum number of hours, n, that Brenda should work as a babysitter to earn enough to buy the large box of chocolate?



Answers

(Brenda savings + Brenda baby sitter earning) should be more or at least equal to 40 
If n = number of hours Brenda works then her baby sitter earning = 7n 

12 + 7n ≥ 40 , so n≥4 

So answer is c
SHE SHOULD WORK 4 HOURS MINUMUM FOR HER BOXES OF CHOCLATE

Which statement is true about the circumference of a circle?

It is about three times the diameter.

It is about three times the radius.

It is about twice the radius.

It is about half the diameter.


Answers

A common formula that is often used is 
C = pi*d

where 
C = circumference
pi = 3.14 approximately
d = diameter

So saying "the circumference is roughly 3 times the diameter" is appropriate because pi = 3.14 is roughly 3 if you round to the nearest whole number.

Answer: Choice A) three times the diameter

Complete the equation and tell what property you used 16+31=31+16

Answers

201555555555555555555555555555555

Other Questions
Which of the following statements describes French service? A. Music is provided during the first course. B. The appropriate silver is placed before each course. C. Guests help themselves from a buffet table. D. The host serves the guests from the head of the table The base of a rectangular pyramid has sides 3 feet long and 7 feet long. The pyramid is 4 feet tall. A second, larger pyramid has dimensions that are 3 times the dimensions of the smaller pyramid. What is the difference between the volumes of the two pyramids? Can someone please help me A recipe for pastry has flour, butter and water mixed in the ratio 24 : 8 : 3 if fiona follows the recipe and uses 3 cups of flour, how many cups of butter should she use? Why are p waves called push-pull waves? A figure of speech that compares two things without using the words "like" or "as" an inference needs to be supported by __ in the text? opinions evidence ideas descriptions A circular pond is to be surrounded by a gravel path. Use the diagram to find the square feet of gravel needed if we know the pond has a radius of 200 ft and the radius of the whole space is 250 ft? Wind blows around low-pressure areas near the surface in the northern hemisphere in what direction Why does the author use separate paragraphs to list tips for a good camping trip? Quadrilateral ABCD has vertices A(-3, 4), B(1, 3), C(3, 6), and D(1, 6). Match each set of vertices of quadrilateral EFGH with the transformation that shows it is congruent to ABCD. Andrew was told by his physician that he would be able to control his diabetes if he controls his diet and avoids the use of sugar in his diet. andrew was given a(n) _____ framed health message by his physician. What are the main advantages and disadvantages of organizing a firm as a corporation there is no limit on the number of owners? HELPCynthia is finding the measures of the labeled angles in this image. What is the least number of angle measures she needs to know to find the measures of all labeled angles in the image?A.She only needs to know the measure of one angle, angle D.B.She only needs to know the measure of one angle, angle A.C.She only needs to know the measures of two angles, angles A and B.D.She only needs to know the measures of two angles, but one of the angles must be one of the remote interior angles. round 345276 to the nearest thousand Which of the following can you conclude about the scene depicted in this painting?A painting depicting a scene in which slaves are getting off of a wagon with some belongings in their arms. In the foreground two children, an adult white woman, and a dog stand. Behind them, a white woman helps an elderly African-American man who is carrying a cane and rubbing his back. Behind this pair, a larger group of African-American adults and children are climbing down from a hay-filled wagon. The larger scene includes a barn and some trees all of which are covered with snow.Library of Congress LC-USZ62-28860 Escaping slaves were able to travel in large family groups. Escaping slaves had many resources to help them along the path to freedom. Escaping slaves had to plan carefully, but often had the means to travel in comfort to freedom. Escaping slavery would have been much more deadly and difficult without help from people along the way. Our awareness of various mental processes, such as making decisions, daydreaming, reflecting, and concentrating, is called How can ABC be mapped to XYZ?First, translate .Next, rotate ABC about B to align the sides and angles. a game spinner has regions that are numbered 1 through 8. if the spinner is used twice, what is the probability that the first number is a 3 and the second is a 7? What is the potential difference vab between points a and b when the switch s is open? Steam Workshop Downloader