Mathematics Middle School

I need help with all of them but 13B you can answer all of them some of them or just one of them make sure to verify which one you are solving please and thank you ​

I Need Help With All Of Them But 13B You Can Answer All Of Them Some Of Them Or Just One Of Them Make

Answers

Answer 1

Answer:

13. 14. 15.

A.) 21 A.)-2 A.) 8

B.) 21 B.) 14 B.) 8

Step-by-step explanation:

13.

A.) 2(4)^2 - 11 = 21. B.) 2(-4)^2 - 11 = 21

* Note: if the power is a even number (2, 4, 6, and on), then the negative won't affect the answer and can be forgotten.

14.

A.)2squareroot16 - 10 = -2.

B.)2squareroot16 - 10 = 14

15.

|-3 - 8| + (-3) =8

|1/2 - 8| + 1/2 = 8

Answer 2
13. a) 21 b) 21. 14. a) -2 b) 14. 15. a) 8 b)8

Related Questions

Please help. Need help

Answers

Answer:

C

Step-by-step explanation:

To do this, let's let the decimal equal n. Thus:

[tex]2.\bar1=n[/tex]

There is only one digit repeating, so let's multiply both sides of the equation by 10:

[tex]21.\bar1=10n[/tex]

Now, subtract n from both sides:

[tex]21.\bar1-n=10n-n[/tex]

On the right, it becomes 9n. However, the left, however, expand, the decimal. In other words:

[tex]21.1111...-2.1111...=9n[/tex]

All of the repeating 1s will cancel out. Thus:

[tex]21-2=9n[/tex]

Subtract:

[tex]19=9n[/tex]

Divide both sides by 9:

[tex]n=\frac{19}{9}[/tex]

And since we set the decimal equal to n originally...

[tex]2.\bar1=\frac{19}{9}[/tex]

And we're done!

Notes:

This is the algebraic way to write a repeating decimal into a fraction. You can, of course, always just use a calculator and guess and check.

It's A. 21/10

What I did to get this. Is i wrote down 2.1 as a fraction: 2.1/1 then multiplied 10 to both the numerator and the denominator. (2.1 x 10)/(1 x 10)=21/10.

I hope this helps. I'm not sure if the "repeating" matters that much to the point of a different answer...

What's 43.396 divided by 57.1? Still confused for this one :(

Answers

Answer:

0.76

Step-by-step explanation:

Because this question is requiring you to divide a smaller number by a greater one you are going to have decimals or fractions.

The value of the division of the number 43.396 by 57.1 is 0.76.

What is division?

A procedure of dividing anything into equal halves is called division. It is one of the four fundamental operations in math. Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

The given numbers are 43.396 and 57.1. The value of the division will be calculated as below:-

Division = 43.396 / 57.1

Division = 0.76

Therefore, the value of the division of the number 43.396 by 57.1 is 0.76.

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BRAINLIEST which statement is correct 4(9)÷6=3+2-1+2 4(9)÷6=4+2-1+2 4(9)÷6=3-2+1-2 4(9)÷6=3÷2+1-2

Answers

Answer:

The correct answer is 4(9)/6=3+2-1+2

Step-by-step explanation:

4x9 is 36..divided by 6 =6. then 3+2=5-1 is 4+2 is 6, so both sides are equal

4(9)6=3+2-1+2 is the answer!

Eddie had a favorable simple annual interest rate on a used car loan, but he can’t remember what it was. His paperwork shows that he originally borrowed S4000 and paid a total of $1280 in interest on the 4-year loan. What was Eddie’s annual interest rate?

Answers

Answer:

8%

Step-by-step explanation:

Answer: 8%

i googled it so yea

Help me please ASAP!!!!!!!

Answers

Answer:

so italy is 7,500,000.00 and park is 21,100,000.00, 1997 is 3.40 and 1998 is 2.70

Step-by-step explanation:

Answer:

rounding means if like a number is 254 round it to the nearest hundred which would be 300 because if you can't round it to the nearest hundred you need to round to the nearest 10 which would be 30 plus the 4 on the end round that it would be 300.

Italy: 7,464,000,60

Pakistan: 21,079,00.30

1997: $3.40

1998: $2.70

hope this helped :)

Will give brainlest for whomever is trying to level up! Consider figure Z in the graphs below. Which figure would result from dilating figure Z with scale factor and then rotating it 90° counterclockwise about the origin?

Answers

I need a picture to answer that

Answer:

need a picture mate!

Step-by-step explanation:

PLEASE HELP ME ITS ABOUT UNIT RATES CHARTS (MATH)

Answers

Answer:

.5 = 3.5    1 = 7  3 = 21     4 = 28

Step-by-step explanation:

A point at a pre-image is G(5-,-2) If its image has coordinates G'(2,1), what was the translation? A.(x-3, y-3) B.(x+3, y-3) C.(x-3, y+3) D.(x+3, y+3)

Answers

Answer:

C

Step-by-step explanation:

5-3=2. -2+3=1

Answer:

It would the be second ome. Hope this helped

Step-by-step explanation:

Serena was planning out her model railroad setup, and wants to be able to boast about it on her social media. She wants the centerpiece to be a scaled down version of Union Station, but wants to make sure she has enough space in her grandfather's basement. Her railroad is in N Scale, 1:160 (one foot on the model is 160 feet in real life). If Denver's Union Station is 495 feet long, how many inches long will the model be as a mixed number?​

Answers

Answer:4

Step-by-step explanation:

Answer:

idk sorry

Step-by-step explanation:

Determine the whole if the part is 126 and the percent is 90%

Answers

Answer:

Hey there!

We can arrange this to say, "90% of the whole is 126."

Thus, we can write an equation, where w is used as a variable to represent the whole.

0.90w=126

Divide by 0.90

w=140

The whole is 140.

Let me know if this helps :)

Answer:

A quarter of a part

Step-by-step explanation:

6 can you help its due in a couple of hours

Answers

Subtract: 14/8 - 8-8

Answer:

4. 3.75

5. They're always even

6. 6/8

7. 2666

8. 673,400

9. Tell me the complete problem so I can solve it

Step-by-step explanation:

There are two different music download companies that offer a monthly plan for downloading songs. S-Jams charges $1.29 per song plus $10 monthly fee. C-tunes charges $0.99 per song plus $16 monthly fee. Write an expression for the cost of S-Jams.

Answers

Answer:

y=1.29x+10

Step-by-step explanation:

y=mx+b

Answer:1.29x+10

Step-by-step explanation the number of songs is unknown and the answer so this is the smallest possible answer

I GIVE BRAINLIEST AND I AM GIVING 20PTS

Answers

Answer:

−40 < 5 over 9 (F − 32) < 125; −40 < F < 257

Answer:kz

Step-by-step explanation:

Compare the numbers below using , or = -6+(-4)____-6-(-4)

Answers

Answer:

<

Step-by-step explanation:

-6+-4=-10

-6--4=-2

-2 is greater than -10

Answer:

-6+(-4)<-6-(-4)

Step-by-step explanation:

-6+(-4)<-6-(-4)

=>-6-4__-6+4

=>-10__-2

=>-10<-2

7(5+3x)–6(x+5)=0 heeeeelllllp

Answers

Answer: x = -1/3

                                                                                                                                               

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Are you looking for what x equals?

Pls help ASAP!!!!!!!!!
Royce is taking violin lessons. The instructor charges an initial fee and an hourly fee. The amount Royce pays based on the length of his lesson is shown in the graph below. What is the instructor’s hourly fee?_____per hour(format $xx.xx). A graph titled Cost of Royce's Violin lesson has length of lesson (hours) on the x-axis and cost (dollars) on the y-axis. A line goes through points (2, 52), (3, 67), (4, 82) and (5, 97).

Answers

67-52= 15
82-67= 15
97-82= 15
52-15=37
(1,37) I think it’s 37 per hour but if it’s not I’m sorry!

Answer:

It is not 37

Step-by-step explanation:

I did the test on eg

Karima, Brenda, Xavier, and Jody are looking for ratios which are equivalent to 4:8 in the columns of the multiplication table below. A multiplication table. Karima says that only the numbers in columns 4 and 8 form equivalent ratios for 4:8. Brenda says that only Karima’s ratios and the numbers in columns 2 and 4 form equivalent ratios for 4:8. Xavier says that Karima’s ratios, Brenda’s ratios, and the numbers in columns 1 and 2 form equivalent ratios for 4:8. Jody says that any pair of columns with even numbers forms equivalent ratios for 4:8. Who is correct? Karima Brenda Xavier Jody

Answers

Answer:

Karima is correct

Step-by-step explanation:

4:8 is equal to 4:8. You can put them in the calculator and divide them by 2 and you get the same equal answer. :)

karima is correct. because it says that only the numbers of the coloms

4t + 1/4=3 first answer will get brainliest

Answers

Answer:

t=11/16

Step-by-step explanation:

4t+1/4=3

-1/4    -1/4

4t=2 3/4

t=11/16

Answer:

Step-by-step explanation:

4t+1/4=3

We move all terms to the left:

4t+1/4-(3)=0

determiningTheFunctionDomain

4t-3+1/4=0

We multiply all the terms by the denominator

4t*4+1-3*4=0

We add all the numbers together, and all the variables

4t*4-11=0

Wy multiply elements

16t-11=0

We move all terms containing t to the left, all other terms to the right

16t=11

t=11/16

t=11/16

Simplify the complex fraction. 1/2 5/8 can someone pls help me i need the answer ASAP

Answers

Answer:

4/5

Step-by-step explanation:

1/2

5/8

1/2 x 8/5=8/10=4/5

As my 7th grade math teacher said, Keep,Change,Flip.

Keep the first factor, change the operation, and flip the other factor

The answer is 4/5 if you need help just use a fraction calculator

Emma and Ed walk into a room containing 30 assembled Tworks and enough pieces to assemble 100 more Tworks. A Twork takes eight minutes to assemble and 10 minutes to disassemble. If Emma starts assembling Tworks as Ed begins disassembling the ones that were already made, and they both continue to work until there are exactly 35 assembled Tworks in the room (and no partially assembled or disassembled Tworks), how many minutes will Emma have worked?

Answers

Answer:

Start with 30 assembled, parts for 100 more.

Each minute results in +1/8 and -1/10

So we want

30 + x/8 - x/10 = 35

x/8 - x/10 = 5

5x - 4x = 200

x = 200 minutes

During 200 minutes, 25 are assembled, 20 are disassembled,

resulting in a net gain of 5, added to the original 30.

Bike ride:

Total distance: 40 km

Desired average speed 20 km/hr

Total time will be 2 hours

20 km at 15 km / hr = 4/3 hour taken

Leaves 2/3 hour for 20 km

20 km in 2/3 hour = 30 km/hr

Gas mileage:

Let m = city mileage

m + 3 = highway mileage

136 / (m+3) + 155 / m = 9

9m^2 - 264m - 465 = 0

m = 31 (discarding negative value)

Bricklaying:

Let b = number of bricks in wall

Lisa lays b/9 bricks per hour

Lauren lays b/10 bricks per hour

b = 5 * (b/9 + b/10 - 10)

b = 5b/9 + 5b/10 - 50

90b = 50b + 45b - 4500

b = 900

Lisa does 100 per hour

Lauren does 90 per hour

Together they do 180 per hour.

That's enough work for one Yahoo Question

The tugboat problem, in various forms I have answered before -

it has appeared many times on Yahoo Answers, sometimes with ferry boats,

sometimes with sailboats.

The ant path problem also can be found on the web in many places I am sure.

00

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gassaway

Lv 4

4 years ago

three. 80x four. 80x + a million five. 250(80x + a million) 6. 250(80x + a million) + y 7. 250(80x + a million) + 2y eight. 250(80x + a million) + 2y - 250 nine. [250(80x + a million) + 2y - 250] / two = [20000x + 250 + 2y - 250] / two = [20000x + 2y] / two = 10000x + y

00

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Step-by-step explanation:

Emma will have worked for 200 minutes.

Given, there are 30  assembled T works in the room initially.

A T work takes eight minutes to assemble, so the rate of assembling T work in one minute will be [tex]\frac{1}{8}[/tex].

Similarly, a T work takes 10 minutes to disassemble. so the rate of disassemble of T work will be  [tex]\frac{1}{10}[/tex].

Let Emma worked for x min.

According to the question,  Emma starts assembling T works as Ed begins disassembling the ones that were already made and they both continue to work until there are exactly 35 assembled T works in the room. So we can write it in equation for form as,

[tex]30+\frac{x}{8} -\frac{x}{10} =35[/tex]

[tex]\frac{x}{8} -\frac{x}{10}=5\\[/tex]

[tex]\frac{5x-4x}{40} =5[/tex]

[tex]x=5\times40[/tex]

[tex]x=200[/tex]

Hence Emma have to work for 200 minutes.

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Please Help ASAP!! Will give BRANLIEST!! f(x)=16 f(4)=3x+5 g(x)=2x^2-4 h(x) = -3x-9

Answers

Answer:

it equals 91

Step-by-step explanation:

which is ur answer and yw :)

The answer is 91 djsjsjsjsj

Ike is five years older than his brother. If Ike's age is represented by x, which of the following would represent his brother's age? A) x + 5 B) 5x C) 5 - x D) x - 5

Answers

Answer:

The answer is D) x-5

Step-by-step explanation:

Because if Ike is 5 years older than his brother and Ike's age is represented by the x and his brother the 5, then it would be Ike minus his brothers age.

The answer is D) x - 5

This is the answer because Ike is 5 years older than his brother and to find out his brothers ages when Ike is x would make it x - 5

What is the value of the expression 2x²- 3x + 7 when x = 3? *

Answers

16

.......................
16
...................

can u guys please help me its due rn

Answers

the 7s in the 1677 would be 77

congruence question- Using the graph shown, select all polygons that are congruent to Polygon Z.

Answers

Polygons A,D and E are congruent to polygon Z

Answer:

A,D and E  Z

Step-by-step explanation:

What is the area of the 6 circles all together? Find the diameter of each circle, divide that by 2 to find the radius. Use the area formula to find the area of one circle then multiply it by 6. Answer should have a label in sq.in. *

Answers

Answer:

Step-by-step explanation:

96 in

96 inches

Step-by-step explanation:

Explain, via absolute value, how to calculate the distance between the coordinates (14, -39) and (14, -211) please answer quick!!!

Answers

Answer:

Just subtract like normal or count the distance between the coordinates.

Step-by-step explanation:

the answer is 172. both x’s are the same. 14-14=0, there is no space between them. since you’re calculating absolute value, you do not take positives or negatives into consideration. 211-39=172. they are 172 (units) apart.

Jacinta says that the product of a rational number and an irrational number is always irrational. Explain her error.

Answers

if u multiply an irrational number by 0 the result will be 0 which is a rational number. Except this case, other times will result with irrationals.

Jacinta says that the product of a rational number and an irrational number is always irrational her claim is wrong.

What is a rational number?

A rational number is one that can be stated mathematically as the ratio or fraction p/q of two numbers, where p and q are the numerator and denominator, respectively.

Irrational numbers are all real numbers that are not rational numbers in mathematics. Irrational numbers, on the other hand, cannot be stated as the ratio of two integers. Decimal notation is the term used to describe the method of representing numbers in the decimal system.

Given that Jacinta says that the product of a rational number and an irrational number is always irrational.

Her statement is incorrect because if 0 a rational number is multiplied with the π which is irrational then the result will be 0 which is rational.

Therefore, Jacinta's claim is wrong.

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To round 7,458 to the nearest hundred, which digit do you look at?

Answers

Step-by-step explanation:

We have the number 7458

In order to round a number to the nearest hundred, you need to look at the place before that one. In the case of the nearest hundred, you need to look at the tens place.

As there is a 5 in the tens place, you would round this number up

Therefore, the rounded number would be 7500

5 because you have 7,000 400 50 8 and you go ten to hundred in this case

There are 8 circles and 2 squares. What is the simplest ratio of squares to circles?

Answers

Answer:

1 square for every 4 circles

1:4

1/4

Step-by-step explanation:

To get it to the simplest ratio all you have to do is put the given numbers (8,2) into fraction form based on the order given in the question. The order given was "squares to circles". This makes squares the numerator and circles the denominator. After you set it into a fraction just reduce the fraction to its simplest form.

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