can you help on 13 and 15

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:

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.

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:

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...

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

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.

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gassaway's avatar

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

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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.

For more details follow the link:

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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. :)

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

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

Answer:

-374.48

Step-by-step explanation:

Answer:

-234.97

Step-by-step explanation:

Answer:

It is because 2 negatives multiplied or divided will always equal a positive  

Hope that helps :)

Step-by-step explanation:

Answer:

The only difference between them is the negative signs but if u take away the negative signs then you have the same numbers. Also 100/5 is the same as -100/-5 because its the opposite. Hope this helps.

Step-by-step explanation:

Answer:

need a picture mate!

Step-by-step explanation:

Answer:

70 and (100%)(40)+(80)(40)

Step-by-step explanation:

hh

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.

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.

To know more about divisions follow

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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 :)

Answer:

here is an example

Step-by-step explanation:

Step 1. Think of the basic fact. Multiply. 6  2  12

Step 2- Count the number of zeros in the factors.

                 60 has 1 zero and

                      20 has 1 zero.

Step 3- Write that number of zeros to the right of The answer is 1,200.

the basic-fact product.

Answer:

A,D and E  Z

Step-by-step explanation:

Answer:

8%

Step-by-step explanation:

Answer: 8%

i googled it so yea

Answer:

Plug in the x and y values

4(1/2)^2 -3(-5)

Apply the exponent so (1/2)^2 or 1/2 • 1/2 which is equal to 1/4

Now you have 4(1/4) -3(-5)

Multiply them out:

4(1/4)=1

-3(-5)=15 [remember a negative times a negative equals a positive]

So now your equation is 1-15

your answer is 1-15= -14

Step-by-step explanation:

Answer:

For the 1st equation y=19x+19b, the answer is b=-x+1/19y.

The 2nd equation 7p+5c=p, the answer is c= -6/5p.

Hope it helps.

Step-by-step explanation:

Answer:

b

Step-by-step explanation:

Answer:

15

Step-by-step explanation:

12 goes into 187 15 times

Answer:

es 15

Step-by-step explanation:

1 2 entra 15 veces e  n 187

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

The force needed to accelerate a truck with a mass of 2,000 kg, at a rate of 3 m/s² is 6000 Newtons.

Force is the influence of either pull or pushes in the body. Basically, gravitation forces, nuclear forces, and friction forces are the types of forces. For e.g. when the wall is hit by a hand then a force is exerted by the hand on the wall as well as the wall also exerts a force on the hand. There are different laws given to Newton to understand force.

Given:

The mass of the truck = 2000 kg,

The acceleration of the truck = 3 m/s²,

Calculate the force as shown below,

Force needed for truck = Acceleration of truck × mass of the truck,

Force = 2000 × 3

Force = 6000 N

To know more about Force:

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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

Answer:

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

Step-by-step explanation:

Answer:

Step-by-step explanation:

96 in

96 inches

Step-by-step explanation:

Answer:

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

Answer:kz

Step-by-step explanation: