Using the numbers and symbols, solve 7x = 42

Answer:

B

Step-by-step explanation:

Nesta questão, estamos interessados ​​em calcular a distância percorrida se um jogador correr a uma velocidade de 43,2 km / h por 3 segundos.

Matematicamente; a distância percorrida = velocidade * tempo

O problema que temos aqui é que nossas unidades não são consistentes.

A melhor maneira de fazer isso é ter unidades consistentes em metros por segundos e segundos, pois nossa resposta está em metros.

Portanto, a conversão que precisamos fazer aqui é converter 43,2 km / h em metros por segundo Matematicamente, sabemos que existem 1000 m em um quilômetro.

Da mesma forma, uma vez que 60 segundos fazem um minuto e 60 minutos fazem uma hora, o número de segundos em uma hora é 60 * 60 = 3.600 segundos

Assim, convertendo 43,2 km / h em m / s, temos; (43,2 * 1000) / 3600 = 12 m / s

Portanto, a distância percorrida em metros seria agora; velocidade em m / s * tempo em segundos = 12 m / s * 3 segundos = 36 m

Answer:

Step-by-step explanation:

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Answer:

Daniel has to wait around 5.24 years to withdraw the money.

Step-by-step explanation:

We are given that Daniel wants to open an account to purchase a new computer. He was able to put $750 into an account that pays him 8.5% interest. The cost of the computer he wants is $1,150.00.

Let the Principal sum of money be represented by 'P'.

The rate of interest be represented by 'R'.

The time period be represented by 'T'.

The final amount of money be represented by 'A'.

Assuming the interest given is compound interest.

So, the formula for calculating the amount of money is given by;

                          [tex]\text{A} = \text{P} \times (1-\text{R})^{\text{T}}[/tex]

Here, A = $1,150, P = $750, R = 8.5% and let the time he have to wait to withdraw the money be 'n'.

So, putting these values in the above formula we get;

[tex]\text{A} = \text{P} \times (1+\text{R})^{\text{T}}[/tex]

[tex]\text{\$1,150} = \text{750} \times (1+\text{0.085})^{\text{n}}[/tex]

[tex](1+\text{0.085})^{\text{n}} = \frac{\$1,150}{\$750}[/tex]

[tex](1+\text{0.085})^{\text{n}} = 1.533[/tex]

Taking log on both sides;

[tex]\text{n} \times ln(1+\text{0.085}) = ln(1.533)[/tex]

[tex]n = \frac{ ln(1.533)}{ ln(1.085)}[/tex]

n = 5.24 years

Hence, he has to wait around 5.24 years to withdraw the money.

Answer:

7

Step-by-step explanation:

To find distance on a number line you add and 2+5=7

===================================================

The right triangles are similar, allowing us to form the proportion below

BD/AD = AD/DC

5/AD = AD/9 .... substitution

5*9 = (AD)*(AD) .... cross multiply

45 = (AD)^2

(AD)^2 = 45

AD = sqrt(45) ... apply square root

We could simplify but your teacher has decided not to. If you want to simplify, then

AD = sqrt(45)

AD = sqrt(9*5)

AD = sqrt(9)*sqrt(5)

AD = 3*sqrt(5)

--------

Segment AD is the geometric mean of BD and DC.

AD = sqrt(BD*DC)

which is the result of solving BD/AD = AD/DC for AD

So,

AD = sqrt(BD*DC)

AD = sqrt(5*9)

AD = sqrt(45)

Answer:

the angle EBA is 25

Step-by-step explanation:

abc is an straight angle it means 180 , so if DBC is 130 you should make a substraction ( abc- dbc) it will give you the other part that acomplish the 180 of abc , and if it is divided by the half it hould be 25 each

Answer:

Wendy will think cookie club chocolate cookies are not chocolatey enough

Step-by-step explanation:

Wendy thinks the perfect chocolate chip cookie has 35 chocolate chips for every 5 ounces of dough. Cookie Club makes batches of chocolate chips cookies with 100 chocolate chips and 15 ounces of dough. What will Wendy think about Cookie Club's cookies?

Perfect chocolate chip cookie=35 chocolate chips for every 5 ounces of dough

Wendy's perfect chocolate chip cookies = 35 chocolate chips for every 5 ounces of dough

= 35 : 5

=7:1

Cookie club chocolate chips cookies=100 chocolate chips for every 15 ounces of dough

=100 : 15

=20 : 3

Cookie club chocolate cookies have 3 times the amount of dough

Therefore,

Wendy will think cookie club chocolate cookies are not chocolatey enough

Answer:

Not choclatey enough

Step-by-step explanation:

Answer:

The answer is 13

Step-by-step explanation:

The distance between 4 and 17 is 13 because addition

The distance between 4 and 17 is 13 units.

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

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.

It is given that the two numbers are 4 and 17.

The distance between 4 and 17 is calculated as below:-

To calculate the distance subtract the value 4 from the value 17.

Distance = 17 - 4 = 13 units.

Therefore, the distance between 4 and 17 is 13 units.

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Answer:

60/100

Step-by-step explanation:

We know that 20 goes into 100 5 times, so we multiple numerator and denominator by 20 to get an equivalent fraction:

[tex]\frac{3}{5} (\frac{20}{20} )=\frac{3(20)}{5(20)} =\frac{60}{100}[/tex]

square root = 24

Step-by-step explanation:

2x2x3x3x4x4 =576

Answer:

24

Step-by-step explanation:

2x2x3x3x4x4

= 2x3x4=24

Answer:

The temperature at 10 pm was -1 degrees and the arrows helped you understand when the temperature increased and decreased.

Step-by-step explanation:

At 8 am, we know that the temperature is -3 degrees, or 3 degrees below zero. By 1 pm, the temperature has risen by 14 degrees and is now 11 degrees. We know this because -3+14=11. Now by 10 pm, the temperature has dropped 12 degrees which means that it's -1 degrees. (11-12=-1) The plot points would be all of the temperatures, or -3, 11, and -1. The arrows you need to draw are from -3 to 11 (an increase) and from 11 to -1 (a decrease). Drawing the arrows this way represents the temperature at different times and how it changed over time.

Answer:

Answer: 140%

Step-by-step explanation:

From the question, we are informed that price increases from $50 to $120. The percentage change will be:

= (New price - Old price)/Old price × 100

= (120 - 50)/50 × 100

= 70/50 × 100

= 1.4 × 100

= 140%

Answer:

1.  1 + 1 x 4 ÷ 1 = 8

Hope this helps.

Answer:

98

Step-by-step explanation: All you have to do is multiply 6 by 3 and then multiply that answer by 2. Then you multiply 9 by 8 and subtract 2, then you add all that together and finally, subtract it by 8

Answer:

The answer is 402.

Step-by-step explanation:

First thing to do is substitute the variables.

6(3)^2+(9(8)-2)+8

Now, multiply and subtract what is in the parenthesis.

6(3)^2+(72-2)+8

6(3)^2+70+8

Now, multiply once again.

18^2+70+8

Now, simplify the exponents.

324+70+8=402

Answer:

q = 8/5r or q = 1.6r

Step-by-step explanation:

-7q + 12r = 3q - 4r

+7q           +7q

12r = 10q - 4r

+4r           +4r

16r = 10q

/10    /10

16/10 = 8/5     8/5 = 1.6

q = 8/5r or q = 1.6r

Answer:

2.78 meters

Step-by-step explanation:

Subtract 6.22 from 9

9 - 6.22

= 2.78

So, she had 2.78 meters of rope left

Answer:

[tex]\huge\boxed{\mathrm{2.78\ meters}}[/tex]

Step-by-step explanation:

Heather had = 9 meters

She cut away = 6.22 meters

Heater have left:

=> 9 - 6.22

=> 2.78 meters

Answer:

Step-by-step explanation:

Graph a line given a point and a slope

Plot the given point.

Use the slope formula to identify the rise and the run.

Starting at the given point, count out the rise and run to mark the second point.

Connect the points with a line.

Answer:  The median is 5

Step-by-step explanation:

The median is the middle number after being arranged from least to greatest.

So arrange the numbers from least to greatest.

1,3,3,4,5,6,8,9,10  

So the middle number in this set is  5

Answer:

What do you mean like the the ratio of cm to inches?

Step-by-step explanation:

?

Answer:D

Step-by-step explanation:

Hope that helped

Answer:

its in the balls

Step-by-step explanation:

Answer:

Hey there!

n+19=40

  -19=-19

n=21

Let me know if this helps :)

Answer:

[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{ n = 21}}}}}[/tex]

Step-by-step explanation:

[tex] \sf{n + 19 = 40}[/tex]

Move 19 to right hand side and change it's sign

⇒[tex] \sf{n = 40 - 19}[/tex]

Subtract 19 from 40

⇒[tex] \sf{n = 21}[/tex]

Hope I helped!

Best regards!!

Answer:

Total- 617.48       Interest- 258.48

Step-by-step explanation:

First, we need to find out what 8% of 359 is.

.08 times 359 = 28.72. This is how much interest is gained in a year. Since she waited 9 years, we multiply 28.72  by 9 and get 258.48. This is the total interest.

Now we just add 258.48 and 359 to get 617.48.

Answer:

617.48

Step-by-step explanation:

SI = P x R x T / 100

SI = Simple Interest

P = Principal

R = Rate

T = Time

SI = 359 x 9 x 8 / 100

=> SI = 2872 x 9 /100

=> SI = 25848 /100

=> SI = 258.48

New Balance = Principal + Simple Interest

=> New Balance = 359 + 258.48

=> New Balance = 617.48

Explanation:

The two given points have x coordinates of x = 6 each. They add to 6+6 = 12. Divide this in half to get 12/2 = 6. Since the x coordinates were both the same, the midpoint x coordinate is the same as well.

The y coordinates are a bit more interesting. Add them up to get -5+1 = -4. Then cut this in half to get -4/2 = -2. The y coordinate of the midpoint is -2.

Overall, the midpoint is (6, -2)

Answer:

the answer is (6.-2)...

Answer:

419.25

Step-by-step explanation:

The calculation of the cost of materials for the cheapest such container is shown below:-

We assume

Width = x

Length = 2x

Height = h

where, length = [tex]2 \times width[/tex]

Base area = lb

= [tex]2x^2[/tex]

Side area = 2lh + 2bh

= 2(2x)h + 2(x)h

= 4xh + 2xh

Volume = 24 which is lbh = 24

[tex]h = \frac{24}{2x^2} \\\\ h = \frac{12}{x^2}[/tex]

Now, cost is

[tex]= 13(2x^2) + 9(4xh + 2xh)\\\\ = 13(2x^2) + 9(4x + 2x)\times \frac{12}{x^2} \\\\ = 26x^2 + \frac{648}{x}[/tex]

now we have to minimize C(x)

So, we need to compute the C'(x)

[tex]= 52x - \frac{648}{x^2}[/tex]

C"(x)  [tex]= 52x - \frac{1,296}{x^3}[/tex]

now for the critical points, we will solve the equation C'(x) = 0

[tex]= 52x - \frac{648}{x^2} = 0\\\\ x = \frac{648}{52}^{\frac{1}{3}}[/tex]

[tex]C" = ((\frac{648}{52} ^{\frac{1}{3} } = 52 + \frac{1296}{(\frac{648}{52})^\frac{1}{3} )^3}\\\\ = 52 + \frac{1296}{\frac{648}{52} } >0[/tex]

So, x is a point of minima that is

= [tex](\frac{648}{52} )^\frac{1}{3}[/tex]

Now, Base material cost is

[tex]= 13(2x^2)\\\\ = 26(\frac{648}{52} )^\frac{2}{3}[/tex]

= 139.75

Side material cost is

[tex]= \frac{648}{x} \\\\ = \frac{648}{(\frac{648}{52})^\frac{1}{3} }[/tex]

= 279.50

and finally

Total cost is

= 139.75 + 279.50

= 419.25

The cost of the side material is $279.50, the cost of the base material is $139.75 and the total cost is $419.25 and this can be determined by using the arithmetic operations.

Given :

Let the width of the rectangular storage container be 'x' then according to the given data the length is '2x' and let the height of the container be 'h'.

The base area of the rectangular storage container is given by:

Base Area = [tex]2x^2[/tex]   ----- (1)

The side area of the rectangular storage container is given by:

Side Area = 2(2x)h + 2xh

                 = 6xh    ---- (2)

Now, the volume of the rectangular storage container is given by:

Volume = lbh

Put the values of known terms in the above equation.

24 = [tex]2x^2h[/tex]

[tex]h = \dfrac{12}{x^2}[/tex]

Now, the cost is given by:

[tex]\rm C(x)=13(2x^2)+9(6xh)[/tex]

[tex]\rm C(x)= 26x^2 + \dfrac{648}{x}[/tex]

Now, to minimize C(x) differentiate the C(x) with respect to x.

[tex]\rm C'(x)=52x -\dfrac{648}{x^2}[/tex]   ---- (3)

Now, equate the above equation to zero.

[tex]0 = 52x =\dfrac{648}{x^2}[/tex]

[tex]x = \sqrt[3]{\dfrac{648}{52}}[/tex]

Now, differentiate equation (3) with respect to x.

[tex]\rm C"(x) = 52+\dfrac{1296}{x^3}[/tex]

Now, put the value of x in the above equation.

[tex]\rm C"(x) = 52+\dfrac{1296}{\dfrac{648}{52}}[/tex]

[tex]\rm C"(x) = 52+104[/tex]

[tex]\rm C"(x) = 156 > 0[/tex]

Therefore, 'x' is the point of minima.

Now, the cost of the base material is:

[tex]= 13\times 2 \times (\dfrac{648}{52})^\frac{2}{3}[/tex]

= $139.75

Now, the cost of the side material is:

[tex]=\dfrac{648}{\sqrt[3]{\dfrac{648}{52}} }[/tex]

= $279.50

Therefore, the total cost is given by:

= 139.75 + 279.50

= $419.25

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Answer:

x

Step-by-step explanation:

you subtract

Answer:

0.02 is different from 0.002 because 0.02 is greater than 0.002

0.02 and 0.002 are the same because they are both decimal numbers

Step-by-step explanation:

0.02 = 2 / 100

0.002 = 2 / 1000

0.02 < 0.002

0.02 is different from 0.002 because 0.02 is greater than 0.002

0.02 can also be written as 2 × 10^2

0.002 can also be written as 2 × 10^3

0.02 and 0.002 are the same because they are both decimal numbers

Answer:

Set the area equal to x2, solve for x, and then multiply the value of x by 4.

Step-by-step explanation:

The area of the picture is given by

A = s^2 where s is the side length

Let the side length be x

A = x^2

Take the square root of each side

sqrt(A) = sqrt(x^2)

x = sqrt(A)

We want to find the perimeter since we are framing the border

P = 4s since the picture is a square

P = 4 * x

Answer:

B.

Step-by-step explanation:

Let's let x represent the side length of the square.

Since the picture is a square, all the lengths are the same. Moreover, the area of the square is x times x or x squared. Thus:

[tex]A=x^2[/tex]

The amount of framing Sachiko needs is represented by the perimeter of the square. The perimeter of a square is determined by the formula:

[tex]P=4x[/tex]

Now, if Sachiko knows the area and she wants to find the perimeter, she can do the following:

First, the area is equal to x^2. So, she should first just find the length itself. So her first step should be to set the area equal to x^2 and then solve for x.

Then, when she has found her length, she just need to multiply it by 4 to get the perimeter or the amount of framing she needs.

Thus, the answer is choice B.

Answer:

The polynomial is -2x³ + 13x² + 3x - 54.

Step-by-step explanation:

The binomial expression is: (x - 6)

The trinomial expression is: (-2x² + x + 9)

Multiply the two expressions to determine the resulting polynomial as follows:

[tex](x-6)(-2x^{2}+x+9)=x(-2x^{2}+x+9)-6(-2x^{2}+x+9)[/tex]

                                   [tex]=-2x^{3}+x^{2}+9x+12x^{2}-6x-54\\=-2x^{3}+13x^{2}+3x-54[/tex]

Thus, the polynomial is -2x³ + 13x² + 3x - 54.