Mathematics Middle School

Volunteers at Sam's school use some of the student council's savings for a special project. They buy 8 backpacks for $8 each and fill each backpack with paper and pens that cost $3. By how much did the student council's savings change because of this project?

The savings was changed by
dollars

Answers

Answer 1
$8 x 8 = $64
$3 x 8 = $24 (presuming this means $3 per backpack)
64+24 = $88
So -$88 (because the savings are decreasing)
Answer 2
88 es la respuesta d esa pregunta

Related Questions

How can you use 5, 5, 5, 5, to make 24 using addition, multiplication, subtraction, or division, but without using other numbers.

Answers

Step-by-step explanation:

5×5×5=125

125-5=120

120÷5=24

Answer:You can do 5 x 5 x 5 and get 125 or maybe do 125 - 5 to get 120 And for the division you do 120 divided by 5 to get 24

Step-by-step explanation:

please help me with this

Answers

The mistake was the first line, they didn’t multiply the two
It is the third one cause he wast supposed to do the opposite

Select all ratios equivalent to 2:3.

Answers

Answer:

12:18 and 10:12 (i think)

Step-by-step explanation:

After converting the given ratios in their simplest form, the equivalent form of 2:3 we get 12:18.

To find the simplest form of a fraction, you have to simplify the numerator and denominator to their lowest terms and keep dividing until you can no longer simplify the fraction any further.

The given ratios are,

12:18,

3:21,

10:12

For the ratio 12:18,

Simplify it by finding the greatest common divisor (GCD) of 12 and 18.

The GCD of 12 and 18 is 6.

By dividing both numbers by 6, we get the smallest ratio of 2:3.

Moving to the ratio of 3:21,

Find the GCD of 3 and 21, which is 3.

Dividing both numbers by 3 results in the smallest ratio of 1:7.

Find the smallest ratio for 10:12.

The GCD of 10 and 12 is 2.

Dividing both numbers by 2 gives us the smallest ratio of 5:6.

Hence, the simplest form of ratios for the given ratios are:

12:18 = 2:3,

3:21 = 1:7,

10:12 = 5:6.

Hence,

The ratio equivalent to 2:3 is 12:18.

Learn more about the ratio visit:

https://brainly.com/question/12024093

#SPJ6

Can somebody help me with questions 11 and 12 I’ll appreciate it!

Answers

11) 88140 divided by 4520 = 19.5 meaning you would need 20 fire extinguishers
Yah why she said I am just here for points

Answer the question in the pic pls. Don’t answer unless you are sure if your answer

Answers

Answer:

its 20

Step-by-step explanation:

20 because 10+10=20. it’s a pattern happening. in each circle you are double the first number and then doubling the second number to get your final answer.

I WILL MARK AS BRAINLIEST! Simplify

Answers

Answer:

a) -42

b) -23

c) -100

d) 45

Answer:

a) | -29 - 13 | = 42

b) | 39 - 62 | = 23

c) | -59 - 41 | = 100

d) | -26 + 71 | = 45

Remember, absolute value refers to a number's distance from zero on the number line, without taking direction into account. A number's absolute value can never be negative.

Hope this helped! :)

Help me mateee or person

Answers

I think it’s person

Please help! Greatly appreciated. Thank you!

Answers

The answer is the last one. (7,-2) (-3,6)

When you reflect a point across the x-axis, the x-coordinate remains the same, but the y-coordinate is taken to be the additive inverse. The reflection of point (x, y) across the x-axis is (x, -y).

Answer: Q(7,-2), S(-3,6)

Step-by-step explanation:

Which number has a 9 that is 1/10 the value of the 9 in 296?

195
409
981
1,956

Answers

Answer:

409

Step-by-step explanation:

This is very easy. First of all you need to workout out 1/10 of the value of the 9 in 296. The value of the 9 in 296 is 90.

1/10 of 90 is 9 (since 1/10 x 90 = 90/10 = 9)

The only number which has 9 as its final digit is 409

409 because if multiply 9 and 296

I WILL MARK AS BRAINLIEST! Find the area and perimeter of the following figures

Answers

Step-by-step explanation:

it is really not complicated. we only need to type the numbers into the calculator.

so, what's the problem ? you don't know what a perimeter is ? it is the circumference, the total way you have to go when waking all around the figure.

you don't know the formulas for the areas of specific figures ?

let's start :

a)

the area of a rectangle is length×width. I hope you know this at least since first grade.

the important thing here is : the result is in² and not just in. it means an area counts the little squares that fill that area.

A = 30×8 = 240 in²

the perimeter, as explained, is the whole way around it. so, in the end, as you can easily see, we would have to go 2 times the long side and 2 times the short side.

the result is in (just a length, a distance not an area, not a cube, ...).

P = 2×30 + 2×8 = 60 + 16 = 76 in

b)

the area of a triangle is

baseline × height / 2

in this case (a right-angled triangle) we can assume one of the sides enclosing the 90 degree angle as baseline and the other as height (since there is already a 90 degree angle between them).

and again, the result is ft². we could express it also e.g. as in², but since the basic measures are in ft, it makes it better understandable to use ft².

A = 12×5/2 = 6×5 = 30 ft²

the perimeter is even easier than for the rectangle, as we have one side less to count.

and as before, we stay with ft.

P = 12 + 13 + 5 = 30 ft

c)

this is the only more special case.

but it is still easy.

the area is baseline × height.

and our unit of measurement here is cm, so the result will be cm².

A = 10×2 = 20 cm²

the perimeter is the same principle as with a regular rectangle, as the angles don't matter. only the side lengths matter.

so, again, while waking around it, we have to pass 2 times the long side and 2 times the short side.

and the result is a length, a distance again, so, it is cm.

P = 2×10 + 2×4 = 20 + 8 = 28 cm

1. A= 240 inches squared P= 76 inches
2. A= 30 feet squared. P=30 feet
3. A= 20 cm squared P= 28 cm

pleasee helppp 15 pointss pleaseee

Answers

Let,
The first triangle with sides 7 and 3.5 be ΔABC
The second triangle with sides 3 and x be ΔCDE

ΔABC ≅ ΔCDE (they are congruent) as:
1) They have a common point C
2) ∠ABC = ∠CDE = 90° (given)

Hence we can say,

AC/CE = BC/CD

= 7/x = 3.5/3

Therefore,
x = (7*3)/3.5
= 21/3.5
= 6
Easyyy
6 is the answer for your question

The model shows the expression 30 +12. Which expression is equivalent to thi sum?

Answers

Answer:

There are many answers to this question like:

7x6

21x2

84/2

27+15

Step-by-step explanation:

If 30+12=42, all you really have to do is check each answer to see if it either adds up to 42, multiplies to get 42, divides to get 42, or subtracts to get 42.

Answer:

6(5+2)

3(10+4)

Step-by-step explanation:

These are just a couple of equivalent sums, I am assuming this is a sort of short response and not a multiple choose so i believe you can use this.

There are 6 red marbles, 9 blue marbles, and 10 green marbles in a bag.

Several trials are performed with the results shown in the table. What is the experimental probability of randomly drawing a red marble?

Red Blue Green
16 30 34
32%
25%
20%
16%

I need help!

Answers

32% is the answer because there is way more green and blue than red

Answer:

I would guess 20%

Step-by-step explanation:

16+30+34)/4)x5   (this is how I think u would get it to be 100)

16/4)x5 = 20

20/100 = 20%

Im less certian about this one than the other but if u think its correct u can try it  

I WILL MARK BRAINLIEST! Solve for X

Answers

Answer:

Step-by-step explanation:

You are to assume in both problems that the two triangles are similar. That is a very dangerous assumption -- especially in later math classes. But in this case, there is no other way to do the problem. The two sets of triangles look like they are proportional.  So set up two ratios that are = to each other

On the left

long side small triange / long side large triangle = base small triangle / base large triangle

On the right

hypotenuse/longest leg = hypotenuse / longest leg.

Problem A

Set up the similar Proportion

5/40 = x/20                Cross Multiply

40x = 20*5

40x = 100                   Divide by 40

x = 100/40

x = 2.5

Problem B

Again set up the similar triangle proportion

15/10 = x/2                  Multiply by 2

15*2/10 = x              

3 = x

for the first one x=2.5
for the second one x=3

I am literally struggling lol

Answers

Answer:

The blank space is 2.

Answer:

2

Step-by-step explanation:

9*22 = 198

(9*20) + (9*2)

= 180 + 18

= 198

Find the unit rate.
20 seats in 4 rows =
seats per row

Answers

Answer:

8 should be the answer

Step-by-step explanation:

5 in each row because 20 divided by 4 is 5

Find the unit rate.
42 apartments on 3 floors
apartments per floor

Answers

Answer:

7

Step-by-step explanation:

Answer:

The answer is 14.

Step-by-step explanation:

All you have to do to figure this problem out is to divide 42 by 3. I hope this helps! :)

15. The floor plan of the basement of a shopping centre is drawn to a scale of 1:400.

If a supermarket has an area of 0.25 m² on the plan, find its actual area in hectares. (1 hectare = 10 000 m²)​

Answers

Answer:

4 hectares

Step-by-step explanation:

The scale factor is:

k = 1/400

Applied to the area we consider k² as the area is the product of two dimensions.

Find the actual area:

0.25 m² : (1/400)² = 0.25 m² * 160000 = 40000 m² = 40000 * 1/10000 hectares = 4 hectares

Complete both Part A and Part B.

Part A:
Jason buys a pair of pants for $28.97, a top for $12.82 and a scarf for $9.18. He has a gift card worth $75. If the sales tax on the purchase is $3.19, what is the total of his purchase?

Part B:
Will he have enough money left to buy a hat for $27.15?
Explain your answer.

Answers

Answer:

Explanation:

Part A:

Total purchase = 28.97 + 12.82 + 9.18 + 3.19 = 54.16$

Part B:

75$ - (54.16 + 27.15) = 75 - 81.31 = -6.31

Therefore, he won’t have enough money to buy the hat.
Part a: When you add them all together you will get $54.16

Part b: no he won’t.

Find the number that makes the ratio equivalent to 35:42
16

Answers

Answer:

5:6

Step-by-step explanation:

35:42

42/ 6 = 7

35/7 = 5

Answer:

35:42

Step-by-step explanation:

pls help this is due tmrw!! i will give brainliest :)

Answers

Answer:

C integers

Step-by-step explanation:

Becoz postive and negative numbers makes integers.

Answer:

A

Step-by-step explanation:

ny number in the form of p/q where p and q are integers and q is not equal to 0 is a rational number. Examples of rational numbers are 1/2, -3/4, 0.3, or 3/10.

Please get right and do quick

Answers

Answer:

h = S/(2 π r) - r

Step-by-step explanation:

Solve for h:

S = 2 π r (r + h)

S = 2 π r (r + h) is equivalent to 2 π r (r + h) = S:

2 π r (r + h) = S

Divide both sides by 2 π r:

r + h = S/(2 π r)

Subtract r from both sides:

Answer: h = S/(2 π r) - r

Answer:

h=s/(2 π r) -r

Step-by-step explanation:

3 fewer than a number squared and four

Answers

Answer:

([tex]n^{2}[/tex]+4)-3

Step-by-step explanation:

since it says "and four" i think it means it is in parenthesis

Answer:

n^2 + 1

Step-by-step explanation:

Let the unknown number be n.  Then "a number squared and four" is

n^2 + 4, and 3 fewer than this result is

n^2 + 3 - 3, or n^2 + 1

I need help with this

Answers

Answer:

What question?

Step-by-step explanation:

Lol what do you want us to do lol

please helpp me i'm kinda not smart in da head

Answers

Answer:

the answer would be C.

Step-by-step explanation:

C is your answer

Answer:

answer b

Step-by-step explanation:

Find the number that makes the ratio equivalent to 11:4.
44:

Answers

Answer:

16

Step-by-step explanation:

11:4

44;x

11x4=44

4x4=16

Answer:

44:16

Step-by-step explanation:

11:4      

44:x

44/11=4

4x4=16

11:4

44:16

Which fraction equals the ratio of rise to run between points (0, 8) and (-4, 3)?

Answers

Answer:

y = 5/4x + 8

Explain Your Answer

answer : y=5/4x + 8

At 6:00 AM, the temperature was 2 degrees Celsius. At 11:00 AM, the temperature was -11 degrees Celsius. By how many degrees Celsius did the temperature change?

A.
-13 degrees
B.
13 degrees
C.
9 degrees
D.
-9 degrees

Answers

Answer:

A

Step-by-step explanation:

2 + (-13) = - 11

Answer:

A

Step-by-step explanation:

It seems right, I checked 2

Simplify the expression.

Answers

[tex]( \frac{1}{4} gh) ^{3} = \frac{ {g}^{3} {h}^{3} }{64} [/tex]

I hope I helped you^_^

Answer:

((1/4g)(h))^3

=1/64  g^3 h^3

Step-by-step explanation:

Circle question of the rug

That you needed answer for is ;

3/4 pi^2  

Step-by-step explanation:

Proof  1/4 pi r^2

We can state the radius of small rug is 3ft

to show Area pi 3^2 = pi 9

If the large rug is 3x this size  

then  pi 9^2 = pi81

So the ratio here is 1 : 9 when 3 cm or 1 : 3 radius

Ratio is 1 : 9 when 1cm or 1 : 3 radius  

When 1 : 9 cm when 5cm or 1 : 3 radius  

So if we are considering an expression of the larger rug  

that shows 3: 1 more radius to that of the small.

1/4 pi^2 becomes 3/4 pi^2 of the smaller rug

As this is 3 x 1/4 pi^2 we show 3/4pi r^2

 

-2 -3 2 3 least to greatest

Answers

Answer:

-3, -2, 2, 3

Step-by-step explanation:

Answer:

Step-by-step explanation:

-3, -2, 2, 3

Other Questions
Help!! Truth table. Thank you. Help me please look at the pictures [tex]2 \times 3 + 45 \div 2 - 6 + 9[/tex]Answer according to BODMAS The bank told me that there___no money in my account .(Is,were,was) The cinema hall___opened yesterday.(Was,have,had) They have___opening a new market. (Been/being/be)I___that ages ago.(Know/knew/knows) Everyone ____a marvelous time. (Have/has/had) 1. Write the following numbers in words:(a) 74 325 (b) 43 711 (c) 19 560(e) 67 459(1) 25 302(g) 36 721(1) 62 897 () 37 264 (k) 45 129(d) 75 434(h) 78 065(1) 43 275numerals Susan has four 20 point projects for math class. Susans scores on the first three projects are 18, 15,and 16.What score does Susan need to earn on project #4 to earn an 85% total average? what indians do under diwali festival?? Which word's first syllable is open?enoughcarefulcarrywhisper In the figure, M and N are midpoints of RT and ST. What is the length of MN If a 2kg metal slug is heated with 1275J of energy which raises its temperature 15K, what is the metal's specific heat capacity? Which phrase best describes a period on the periodic table? a. elements that are in the same groupb. elements that have the same number of electrons c. a column of elements d. a row of elements PLS HELP ITS DUE TODAY ;(What are the costs and benefits of NAFTA to consumers and workers? Write your response in a well-developed paragraph and include an explanation of NAFTA. What information can be revealed through characterization The volume of a sphere is a function of itsradius, V=43r3. Evaluate the function for the volume of a volleyball with radius 11.6 cm. help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! why cannot an athlete stop instantaneously when he reaches the end in after the race Which choices are equivalent to the expression below? Check all that apply.5/3O A. 15.15B. 75C. 45D. 25/3E. 75F. 13.5 please help me is for my homework Find (fog)(x) when f(x)=2/x+3 and g(x)=1/2xAny help is appreciated :) Pls Help!! Alex is making bows for her friends out of a long piece of ribbon. A. Alex needs 9 inches of ribbon to make a bow. If she has a foot of ribbon, what fractional part of this length of ribbon is needed to make a bow? (Note: 1 foot = 12 inches) Also explain how you found your answer.