Mathematics Middle School

what is 25%of $80
[tex]1 \div 25 \times 80[/tex]

What Is 25%of $80[tex]1 \div 25 \times 80[/tex]

Answers

Answer 1
25% of 80 = 0.25 * 80 = 20

1/25 * 80 = 1/25 * 80/1 = 80/25 = 3.2

Related Questions

if you know 8×10=80, what other related multiplication fact do you know?

Answers

I know many multiplications facts. Related ones could be the 8 times tables or the 10 times table. I could list all of them up to 100.
10,20,30,40,50,60,70,80,90,100.
8,16,24,32,40,48,56,64,72,80,88,96.

{35 POINTS)What are the solutions of 2a^3-3a^2=8a-12 ?

Answers

Greetings!

[tex]2a^3-3a^2=8a-12[/tex]
Add -(8a-12) to both sides.
[tex](2a^3-3a^2)+-(8a-12)=8a-12-(8a-12)[/tex]
Simplify.
[tex]2a^3-3a^2-8a+12=0[/tex]
Rearrange.
[tex]2a^3-8a-3a^2+12=0[/tex]
Factor Out 2a.
[tex]2a(a^2-4)-3a^2+12=0[/tex]
Factor Out the difference of squares.
[tex]2a(a-2)(a+2)-3a^2+12=0[/tex]
Factor out -3.
[tex]2a(a-2)(a+2)-3(a^2-4)=0[/tex]
Factor Out the difference of squares.
[tex]2a(a-2)(a+2)-3(a-2)(a+2)=0[/tex]
Find Common Factor.
[tex](a+2)(a-2)(2a-3)=0[/tex]
Set Factors to Equal 0.
[tex](a+2)=0 \\ \\ (a-2)=0 \\ \\ (2a-3)=0[/tex]
[tex]a=-2 \\ \\ a=2 \\ \\ a=3/2[/tex]

Hope this helps.
-Benjamin

my book is 52 pages. I have already read 18 pages. I plan to read 10 pages each day until I finish the book.
Estimate about how many days it will take to finish reading the book.
A. 3
B. 7
C. 12
D. 30

Answers

52-18=34
34/10=3.4
Approx 3days
A.3

explain how fractions strips can be used to find five fractions bequal to 3/6 list three equivalent fractions

Answers

1/2 , 4/8 , 12/24 , 50/100
Fraction strips can be used to find five fractions equal to 3/6 because it shows the different fractions that are equivalent to 3/6 by multiplication or division. It also shows the simple version of the number. 3 equal fractions to 3/6 : 1/2, 9/18, 15/30

A section of a boardwalk is made using 15 boards. Each board is 9 1/4 inches wide. The total width of the section is 144 inches. The spacing between each board is equal. What is the width of the spacing between each board? Write your answer in simplest form.

Answers

You would solve it by doing
9 1/4 (15)+x=144.
You would find the space the boards take up and then subtract that from the total width.

Solve the equation 3/7k=12/35

Answers

3/7k=12/35 is the answer to this question

Which is the best definition of a quadrilateral?

A.
a 4-sided polygon with no equal sides

B.
a parallelogram with no equal sides

C.
a 4-sided polygon

D.
a parallelogram with 2 pairs of equal angles

Answers

The best definition would be choice C) a 4-sided polygon.
C. A 4-sided polygon.

Is the graph of a function that relates a squares side length to its perimeter continuous or discrete

Answers

Side length can be written not only as integer, but also as mixed number, or fraction, so this quantity is continuous.

Examples of "discrete" would be {1, 5, 7, 8, 11, ...}:  all integer!


-2(u+3)-5u

use distributive property to simplify

Answers

the answer is 
-2(u+3)-5u
 -2u-6-5u
  -3u-6

Distributing -2 to u+3:

-2(u+3) - 5u
-2u - 6 - 5u

Combining like terms:

-7u - 6

Hope this helps!

The ratio of red poms to yellow poms on a float is 5 to 7. if there are 392 yellow poms on the float, how many red poms are there? a. 549 b.390 c. 280 d. 56

Answers

ratio is written in x:y. therefore for this case, red:yellow
5 : 7

since the question states that there are 392 yellow poms, the 7 units represents 392 yellow poms. now you have to gind what is one unit and then multiply by 5 to find the number of red poms.

392 represents 7 units
1 unit: 392/7=56
5 units: 5×56=280 red poms

therefore the answer is 280 red poms which is C.

Jumps has $55 in her savings account. This is $21 more than David. Write and solve an equation to find the amount David has in his savings account.

Answers

Final answer:

David has $34 in his savings account. This was found by setting up an equation where the amount Jumps has is $21 more than David's amount and then solving for David's savings.

Explanation:

The task is to find out the amount of money David has in his savings account. Let's denote the amount David has as D. According to the information provided, Jumps has $21 more than David, and she has a total of $55 in her savings account. We can set up an equation to model this situation:

D + $21 = $55

To solve for D, we need to subtract $21 from both sides of the equation:

D + $21 - $21 = $55 - $21

D = $34

Therefore, David has $34 in his savings account.

Final answer:

David has $34 in his savings account, which we found by setting up and solving the equation 55 = X + 21, where X represents David's savings.

Explanation:

To find the amount David has in his savings account, we need to set up an equation based on the information provided:



Jumps has $55 in her savings account, which is $21 more than David has. Let's define the amount David has as X. According to the problem, we can write the equation as:



55 = X + 21



To solve for X, we subtract 21 from both sides of the equation:



55 - 21 = X



Which simplifies to:



34 = X



Therefore, David has $34 in his savings account.

How do you use the distributive property to solve 24 + 36 using a(b+c) form

Answers

24 + 36

12(2 + 3)                     (take out common denominators)

12(5) = 60

24 + 36 = 60

True

hope this helps
Hey there! 

Answer:[tex]4(6 + 9)[/tex]

Because,
[tex]4 ( 6 + 9) \\ \\ 4(6) = 24 \\ \\ 4(9) = 36 [/tex]

Good luck on your assignment and enjoy your day!

~[tex]MeIsKaitlyn:)[/tex]

What is the value of m? 12+(7+m)=30 Drag and drop the correct answer in the box.

Answers

12 + (7 + m) = 30
m = 30 - 12 - 7 =
11
---------------------
12+7+11= 30

Answer:

11

Step-by-step explanation:

12+(7+m)=30

12+7=19

30-19=11

m=11

Find unit rate. The tub fills with 12 gallons of water in 5 minutes?

Answers

2.4 gallons in 1 minute.

Quick help: 7th grade hw question
"You are buying flowers to hand out at a school dance. Roses cost 30$ for a dozen but cost more if bought individually. With the money you have, you can buy 7 dozen and four single roses (64). How much is one rose? How much money do you have?

Answers

One rose is $2.50

You have $220

How I solved the total cost of one rose was I did 30/12 to get 2.5.

Then to solve my amount of money I have, I did 30 x 7 then I did 2.5 x 4 and added those totals together
.

The sum of three numbers is 87. The third number is 2 times the second. The first number is 7 more that the second. What are the numbers?

Answers

19 + 57 + 9 = 85 
Do you need farther explaining

A robot can complete 3 tasks in 4/5 hour. Each task takes the same amount of time.

a. How long does it take the robot to complete one​ task?

b. How many tasks can the robot complete in one​ hour?

Answers

a. 16 minutes.
b. around 3.5 tasks.
Hello! I can help you with this!

a. Okay. So, it takes 4/5 hour (48 minutes) to complete 3 tasks. To find the answer, divide the amount of time by the number of tasks. 48/3 = 16. It takes the robot 16 minutes to complete 1 task.

b. So it takes 16 minutes to complete 1 task. To solve this, we can do 60/16. 60/16 is 3.75 or 3 3/4 in simplest form. But you can’t exactly count 3/4 as one task. The robot can only complete 3 tasks in one hour.

(12x-32) factored using GCF

Answers

4(3x-8) is factored using gfc. 4 is the gcf

Dudley is biking. He wants to cover 40 miles. If he travels 30 miles every 2 hours, what is the equation of a line that models y, the number of miles he has left to travel, after biking x hours?

Answers

40d x s +40=120 miles I think Im not Sure

Answer:

y=-15x+40

Step-by-step explanation:

30 in 2 hours

-15 per 1 hour=15-40

takes away 15 each hour until he covers 40 miles

Relationship A has a greater rate than Relationship B. This table represents Relationship B.
Hours worked (2 ) (4 ) (5 ) (8 )
Amount paid (30.40) (60.80) (76) (121.60)
Which equation could represent Relationship A? Hours worked is represented by x and Amount paid is represented by y.
Select each correct answer.
A. y = 16.4x
B. y = 14.9x
C. y = 15.4x
D. y = 15.2x

Answers

The correct equation that could represent Relationship A, which has a greater rate than Relationship B, is A. y = 16.4x as it is the only rate per hour greater than that of Relationship B's $15.20 per hour.

The student's question concerns comparing rates of pay in two different linear relationships. Given the table for Relationship B, we can calculate the rate per hour for Relationship B and then compare this to the rates provided in the equations for Relationship A. By looking at the data provided for Relationship B, we can see that the rate is constant. For example, for 2 hours worked, the amount paid is $30.40, which results in a rate of $30.40 / 2 hours = $15.20 per hour.

Because Relationship A has a greater rate than Relationship B, we are looking for an equation where the rate (slope) is greater than $15.20 per hour. Therefore, we eliminate any option where the rate is less than or equal to $15.20. Looking at the provided options:

A. y = 16.4x

B. y = 14.9x

C. y = 15.4x

D. y = 15.2x

Since options B ($14.9 per hour), C ($15.4 per hour), and D ($15.2 per hour) have rates that are either less than or equal to the rate of Relationship B, they cannot represent Relationship A which has a greater rate. Therefore, the only possible option is A. y = 16.4x, which represents a rate that is greater than the rate we determined for Relationship B.

Ana runs 3/4 miles in 6 minutes or 1/10 hour. What is her spores in miles per hour?

Answers

3/4 divided by 1/10
15/2=7.5 miles/hr

Evaluate. 53−(648)+102 Enter your answer in the box.

Answers

I think the answer is -493.

The final result is 803.

To evaluate the given expression 53 − (−648) + 102, we need to follow the rules of arithmetic operations, particularly the order of operations known as PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).

First, we look inside the parentheses. Since we have a negative sign before the parentheses, we understand that we are subtracting a negative value which is the same as adding its positive equivalent. So our expression will become 53 + 648 + 102.

Next, we perform the addition operation: 53 + 648 = 701 Adding 102 to 701: 701 + 102 = 803

The final result of evaluating the expression is 803.

Kyle wants to find the equation of the line that passes through the points (1, –7) and (–1, 1) . Which set of calculations will help Kyle find the equation of the line?

Answers

y=-4x-3  in slope y form 

Simplify 26/5(5/13b+10/26) .

Answers

The answer is 2b+2 hope this will help

Solve the following equation, and check your solution. Be sure to show all work in order to receive full credit.

Solve 24 - 3 x = -27.

Answers

Answer:

17

Step-by-step explanation:

Given,

24 - 3 x = -27.

24+27 = 3[tex]x[/tex]

3[tex]x[/tex] = 51

[tex]x[/tex] = [tex]\frac{51}{3}[/tex]

[tex]x[/tex] = 17

what are algebraic expressions?

Answers

Algebraic expressions are mathematical phrase that can contain ordinary numbers, variables, and operators.

An algebraic expression is a mathematical phrase that includes one or more variables. (Examples) 5+x
                                       n-7
                                       4*y,4 x y,4y
                                        n/2

90/ [10(3squared - 4)

Answers

90/ [10(3^2 - 4)]
= 90/ [ 10 (5)]
= 90/ 50
= 9/5
= 1.8

Vivian draws three right triangles in each figure she measures a pair of angles shown which conjecture is reasonable for Vivian to make

Answers

Here is the picture needed to answer this question. I need help with it as well, so please do help

complementary angles

How does alternate freezing and thawing of water cause weathering to occur?

Answers

Hi. When water seeps into the cracks in rocks it expands as it freezes. Once it thaws, it seeps yet again into additional cracks in the rock. Over time, this causes large chunks of the rock to loosen and subsequently fall off.

Hope this helps.

Take care,
Diana

How does alternate freezing and thawing of water cause weathering to occur? Freezing chemically alters the rock surfaces Water expands when it freezes and cracks rocks open Thawing causes rock particles to move from place to place. User is waiting for your help.

how many kilometers could 217 km red car travel in 12 hours write an equation to show your work

Answers

You would have 18.08 kilometers. In order to solve you have to divide two hundred and seventeen along with twelve.

Answer:

The required equation is: [tex]217\times 12=2,604[/tex]

The red car can travel 2,604 Km in 12 hours.

Step-by-step explanation:

Consider the provided information.

It is given that the speed of red car is 217 km\hr

We need to write an equation and find how many kilometers could red car travel in 12 hours.

The required equation is: [tex]217\times 12=2,604[/tex]

Hence, the red car can travel 2,604 Km in 12 hours.

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