Is the ratio 4.2 : 1.5 proportional to the ratio 12.6 : 4.5? Explain

Answer:

84/5

Step-by-step explanation:

6/5×84

since the question said "each"

Answer:

-3

Step-by-step explanation:

\((5(-3)+4= -15+4=-11) (2(-3)-5=-6-5=-11)(-11=-11)\)

Answer:

y = -3

Step-by-step explanation:

Isolate y

5y + 4 = 2y - 5

subtract y from both equations

3y + 4 = -5

Add 5 to both sides

3y +9 = 0

subtract 9 from both sides

3y = -9

divide both sides by 3

y = -3

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The answer is 8 so its a direct proportion

I think...

The constant of Proportionality is 8.

If the ratio of one variable to the other is constant, then there is a proportional relationship between the two variables. If x and y are in a proportional relationship, then the ratio of y to x is the constant of proportionality. We can also express it as x is to y at times.

Given:

Total Baseball Caps= 30

Total amount of Cap= $240

let the number of caps sold be c.

Then, the equation is

30 c= 240

and, c= 240/30

c= 8

Hence, the constant of Proportionality is 8.

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Answer:

Eeee t hola como estas espero que bien asi 2

Answer:

y = 15

Step-by-step explanation:

We need to solve for k

y = x

21 = 7k  Divide both sides by 7 to solve for k

3 = k

y = xk

y = 5(3)

y = 15

Answer: y = 15

Step-by-step explanation:  

Answer:

A = plane

B = whale

C = sunken ship

Step-by-step explanation:

The given vertical number line is modelling the positions of objects and animals in relation to sea level.

Sea level is the average height of the surface of the world's oceans, which we use as a reference point to measure the elevation and depth of land and water features on Earth.

From inspection of the given number line:

We have been told that a plane is flying at 8,500 feet above sea level. Therefore, as position A is the only position above sea level, A = plane.

We have been told that a sunken ship is resting at 3,000 feet below sea level, and that directly above the ship, a whale is swimming 1,960 feet below sea level. Therefore, the whale is above the ship. As position B is above position C, this means that B = whale and C = sunken ship.

Answer:

D

Step-by-step explanation:

just multiply the three over four inches with seven and a half to get the accurate measurements

Answer: B ,hope it helps!

This is a word problem for 12.

Laura decided to throw a party. The DJ charged 2 dollars an hour and 4 dollars to use lights and fog. How long did the DJ play?

This one is for 11.

Kate wanted to go skating. When she got there it was 4 dollars an hour. The total cost was 12 dollars. How many hours did she skate?

Answer:

(Price x 0.20) + price

Step-by-step explanation:

To find a certain percentage of something, move the decimal on the percent 2 places to the left and multiply that by the original number

If something is marked up by a certain price, that means you’re adding to it so you just have to add whatever 20% of the item is to the original cost

The expression that represents the cost a customer pays for the item would be (Price x 0.20) + price

Expression in maths is defined as the collection of numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

We are given that store marks up the price of an item by 20%.

To determine a certain percentage of something, move the decimal on the percent 2 places to the left and multiply that by the original number

If something is marked up by a certain price, that means you’re adding to it so we just have to add whatever 20% of the item is to the original cost.

Then the expression is

(Price x 0.20) + price

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Answer:

4.9y² + 2y + 4.7

Distributive property

Step-by-step explanation:

\(3.9y^2+5.8+4y-1.1-2y+y^2\)

collect and combine like terms:

\(\implies 4.9y^2 +2y+4.7\)

Distributive property

The distributive property states that an expression which is given in form of A (B + C) can be solved as A x (B + C) = AB + AC.  Similarly, A (B - C) can be solved as A x (B - C) = AB - AC

Answer:

1 8 9 6

y= 3x

Step-by-step explanation:

Answer:

b

Step-by-step explanation:

Answer:

there first set they do 64 and then the rest of the sets the decide to do they do 32 sit ups as there subsequent set

Answer:

They are divided by 2 each time they do a set.

Step-by-step explanation: key word each.

Answ

Step-by-step explanation:

Answer:

Step-by-step explanation:

32

Answer:10

Step-by-step explanation: this is a middle school question? lool

Explanation:

The data from the stem-and-leaf plot is:

10,

24,25,26,

30,30,32,33,

40,45,46

Add up those values

10+24+25+26+30+30+32+33+40+45+46 = 341

Then divide over n = 11 which is the sample size.

341/11 = 31 is the arithmetic mean.

Answer:

341/11 = 31 is the arithmetic mean.

Step-by-step explanation:

Answer:

Step-by-step explanation:

There is a total of 27 tickets, and 3 of them are regular tickets

To find the percentage, we divide early-admission tickets by the regular tickets , which is 27/3.

We can then simplify 27/3, or 9 which is 90%.

Answer:

90%

Step-by-step explanation:

Step-by-step explanation:

1.) 5x-4y=20

y=5/4x-5

5x/4-5=0

x=4

2.) 3x+3y=15

y=-x+5

x+5=0

-x=-5

=x=5

3.) y=3/4x-2

3/4x-2=0

x=0

3x4x/4 -2 x4x-0x4x

3-2x4x=0x4x

3-8x=0

8x=-3

=x=3/8

4.) y=3/2x+3

3/2x+3=0

x=0x

3x2x/2+3x2x=0x2x

3+3x2x=0x2x

3+6x=0

6x=-3

x=_3/6

=x=-1/2

Answer:

C. $1,350

Step-by-step explanation:

To find Maren's initial investment, look for the y-axis value when time = 0, because this is when the account was presumably opened.

The graph shows a reading between 1,200 and 1,500, so it can be presumed that the initial investment was aroundabout $1,350.

Answer:

I think the answer choices are incorrect. 7 1/2 in decimal form would be 7.5. Please correct me if I'm wrong.

Step-by-step explanation:

Answer:

To find the mass of

1

mole of  look up the atomic mass of each element and multiply it by the number of atoms contained in each element in the molecule.

mass of

1

mole of

=

Step-by-step explanation:

The options 1,2 and 5 are the correct answer.

The given equation is 1.23/\(10^1\)=0.123.

The division is one of the basic arithmetic operations in math in which a larger number is broken down into smaller groups having the same number of items.

Now,

1) 1.23/\(10^1\)=0.123

Here LHS=RHS

2) 123/100=1.23

Here LHS=RHS

3) 12.3/\(10^0\)=1.23

⇒ 12.3/1=12.3

So, LHS≠RHS

4) 0.123/10=1.23

⇒ 0.123/10 = 0.0123

So, LHS≠RHS

5) 1230/10³=1.23

⇒ 1230/1000

= 1.23

Here LHS=RHS

Therefore, the options 1,2 and 5 are the correct answer.

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"Your question is incomplete, probably the complete question/missing part is:"

Use mental math to decide which equations are true. Drag the true equations into the box.

1.23/\(10^1\)=0.123

123/100=1.23

12.3/\(10^0\)=1.23

0.123/10=1.23

1230/10³=1.23

Answer:

Derions answer is not correct becuase 500 x 0.015=7.5 inches.  If he got this as an answer that would meen that the stack of paper is 7.5 inches tall, which is not correct.  

If we divide 1.875 by 500 we get 0.00375 which is the thickness of each sheet of paper.

Answer:

\(13.5 m^{2}\)

Step-by-step explanation:

area = length × width

       = 15m  × 9/10m

       = 15m  ×  0.9m

       = \(13.5 m^{2}\)

Answer:

\(\Huge \fbox{Area = 13.5 m^{2}$}\)

Step-by-step explanation:

To find the area of the baseboard, we need to multiply the length by the width:

To multiply these values, we can convert the width to a decimal by dividing the numerator (9) by the denominator (10):

Now we can multiply the length and width:

Therefore, the area of the baseboard is 13.5 m².

__________________________________________________________

Hello,

We have : (a + b)² = a² + 2ab + b²

4x² + 20x + 25 = (2x)² + 2 × 2x × 5 + 5² = (2x + 5)² → answer B

Here, we have a = 2x and b = 5 !

Answer:

\(\textsf{b.} \quad (2x+5)^2\)

Step-by-step explanation:

Given quadratic equation:

\(4x^2+20x+25\)

To factor a quadratic in the form \(ax^2+bx+c\), find two numbers that multiply to \(ac\) and sum to \(b\).

\(\implies ac=4 \times 25=100\)

\(\implies b=20\)

Factors of 100 that sum to 20:   10 and 10

Rewrite \(b\) as the sum of these two numbers:

\(\implies 4x^2+10x+10x+25\)

Factorize the first two terms and the last two terms separately:

\(\implies 2x(2x+5)+5(2x+5)\)

Factor out the common term (2x + 5):

\(\implies (2x+5)(2x+5)\)

Simplify:

\(\implies (2x+5)^2\)

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Answer: 350

Step-by-step explanation:

Divide it by the centimeter

Answer:

350  (*^▽^*)

Step-by-step explanation:

Answer:

25

Step-by-step explanation:

4a +12 -2c + c

4( ) + 12 - 2( ) + ( )

4(4) + 12 - 2(3) + 3

16 + 12 - 6 + 3

28 - 6 + 3

22 + 3

25

Helping in the name of Jesus.

Therefore,  4a  +   12   -   2c   +   c  =   25

       a  =   4  

       c  =   3

        4a  +   12   -   2c   +   c

       (4)(4)  +  12  -     (2)(3)   +    3

         16     +   12   -   (2)(3)   +    3

         28      -            (2)(3)    +    3

         28     -   6     +     3

         22    +      3   =   25

Draw a conclusion:

     4a  +   12   -   2c   +   c   =  25

I hope this helps!