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Bob the builder is making 480kg of a concrete mix. Concrete is made by mixing cement , said and gravel in ratio 1:3:4.

How much sand does he need?

The amount that the jeweler would charge Mrs. Luisa, given the prices of the successive jewelry would be $ 19, 680

The charge for repairing the jewelry pieces is calculated in a geometric progression:

= 6, 63, 63 ², 63 ³, ..., 63 ⁷

The sum of the first n terms in such a progression is:

S = a x (r ⁿ - 1) / ( r - 1 )

Seeing as there are 8 pieces of jewelry, the total cost to Mrs. Luisa would be:

S = 6 x ( 3 ⁸  - 1) / ( 3 - 1 )

S = 6 x ( 6561 - 1 ) / 2

S = 6 x 6560 / 2

S = 3 x 6560

S = $ 19, 680

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Answer:

51.5

Step-by-step explanation:

Answer:

---------------------------

To find the median of the given data set, we need to first arrange the data in numerical order:

There are a total of 8 numbers in this set, which is an even number, so to find the median we need to take the average of the two middle numbers:

Therefore, the median of the data set is 51.5.

Answer: The correct answer is 42

Step-by-step explanation:

Answer:

8/21

Step-by-step explanation:

4 2/3=8/3, times 1/7 (or divide by 7) equals 8/21.

There are 58 Adventure Scouts slept outside on the camping trip.

Let's denote the number of scouts who slept in a cabin, tent, and outside as c, t, and o, respectively. We know that the total number of scouts is 115, so:

c + t + o = 115

We also know that twice as many scouts slept in a cabin as slept in a tent, so:

c = 2t

And we know that the same number of scouts slept outside as slept in a cabin, so:

o = c

We can use these equations to solve for the number of scouts who slept outside:

c + t + o = 115

2t + t + t = 115 (substituting c = 2t and o = c)

4t = 115

t ≈ 28.75

Since we can't have a fractional number of scouts, we need to round this up or down. However, we also know that the number of scouts who slept outside is the same as the number who slept in a cabin, which means that either c or o must be even (since c is twice t). Therefore, we'll round t up to 29 and use that to solve for c and o:

c = 2t ≈ 58

o = c ≈ 58

So, we can conclude that 58 Adventure Scouts slept outside on the camping trip.

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Answer:

46

Step-by-step explanation:

You need to find how many Adventure Scouts slept outside. Start with the information in the problem.

A total of 115 scouts went camping.

Twice as many slept in a cabin as slept in a tent.

The same number slept outside as slept in a cabin.

You can use a diagram to model the problem. Fewer scouts slept in a tent than the other choices. So, start with the scouts who slept in a tent.

Twice as many scouts slept in a cabin as slept in a tent. So, draw 1 box to represent the number who slept in a tent and 2 boxes to represent the number who slept in a cabin.

tent

cabin

outside

The same number of scouts slept outside as slept in a cabin. There are 2 boxes for scouts who slept in a cabin. So, draw 2 boxes to represent the number who slept outside.

tent

cabin

outside

There are 5 boxes in the diagram in all. There were 115 scouts on the trip altogether. So, each box represents 115÷5 scouts. Divide.

2 3

5

1 1 5

– 1 0

1 5

– 1 5

0

Each box represents 23 scouts. There are 2 boxes for the scouts who slept outside. Multiply to find the number of scouts who slept outside.

2 3

×  2

4 6

46 Adventure Scouts slept outside.

Answer: To solve this problem, we can use the formula for compound interest:

A = P(1 + r/n)^(nt)

Where:

A is the final amount

P is the initial principal (the amount borrowed)

r is the annual interest rate (as a decimal)

n is the number of times the interest is compounded per year

t is the time period in years

In this case, we have:

P = $21,000

r = 8.75% = 0.0875

n = 1 (interest is compounded annually)

t = 13 years

So, plugging these values into the formula, we get:

A = 21,000(1 + 0.0875/1)^(1*13)

A = 21,000(1.0875)^13

A = $58,150.51

Therefore, if the loan is paid in full at the end of the 13-year period, $58,150.51 must be paid back, which includes the original principal plus the interest accrued over the 13-year period.

Step-by-step explanation:

The correct variables which are continuous are,

1. Length of a frog's jump.

2. Monthly TV cable bills.

3. Lottery revenues of states.

4. Number of wheels of a car.

We have to given that;

To find correct variables which are continuous.

Since, The number of wheels of a car is a discrete variable, because it can only take certain integer values (2, 3, 4, etc.), while the other variables can take any real value within a certain range.

Hence, The correct variables which are continuous are,

1. Length of a frog's jump.

2. Monthly TV cable bills.

3. Lottery revenues of states.

4. Number of wheels of a car.

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It's important to note that shifting a function involves changing the corresponding variables (x or y) in the equation to achieve the desired translation.

The parabola y = x^2 represents a standard upward-opening parabola with its vertex at the origin (0, 0). To shift this parabola down by 3 units, we subtract 3 from the y-coordinate of each point on the original parabola. Thus, the equation of the shifted parabola becomes y = x^2 - 3.

Similarly, to shift the parabola to the left by 2 units, we subtract 2 from the x-coordinate of each point on the original parabola. The equation of the parabola shifted down by 3 units and to the left by 2 units is y = (x + 2)^2 - 3.

In the shifted parabola, the vertex will be at the point (-2, -3). The parabola retains its general shape, but its position in the coordinate plane has changed. It is now translated 2 units to the left and 3 units down compared to the original parabola y = x^2.

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The exponential function, 2ˣ, eventually overtakes the quadratic function 8·x², when 2ˣ = 8·x², such that at x = 10, 2ˣ > 8·x². Please see the required table in the following section

The shape of a quadratic function is a parabola

An exponential function is a function in which the input variable is an exponent.

The table of values, obtained by creating equations using MS Excel spreadsheet can be presented as follows;

x   [tex]{}[/tex]                  2ˣ                        8·x²

0     [tex]{}[/tex]               1                           0

1 [tex]{}[/tex]                    2                          8

2[tex]{}[/tex]                    4                          32

3[tex]{}[/tex]                    8                          72

4[tex]{}[/tex]                   16                         128

5[tex]{}[/tex]                   32                        200

6[tex]{}[/tex]                  64                        288

7 [tex]{}[/tex]                 128                       392

8[tex]{}[/tex]                  256                      512

9[tex]{}[/tex]                  512                       648

10[tex]{}[/tex]                1024                    800

11[tex]{}[/tex]                 2048                    968

The shape of a quadratic function is called a parabola

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The difference between the sample means is A = ( 4√10/3 )

Given data ,

Difference between sample means A = (t-statistic) * (estimated standard error) / √(1/n1 + 1/n2)

On simplifying , we get

To find the difference between the sample means, we need to multiply the estimated standard error by the t-statistic and then divide by the square root of the sum of the reciprocals of the sample sizes.

Given that the estimated standard error is 2 points, the t-statistic is 1.500, and the sample sizes are n1 = 8 and n2 = 10, we can substitute these values into the formula:

Difference between sample means = (1.500) x (2) / √(1/8 + 1/10)

Calculating the sum of the reciprocals of the sample sizes:

1/8 + 1/10 = 5/40 + 4/40 = 9/40

Difference between sample means = (1.500) x (2) / √(9/40)

A √(9/40) = √(9) / √(40) = 3 / (2 x √(10))

Difference between sample means = 1.500 x 2 x (2 x √(10) / 3)

Difference between sample means ≈ 4√(10) / 3

Therefore, the difference between the sample means is ( 4√10/3 )

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Answer:

0.66

Step-by-step explanation:

please read attachments

The angles in the circle are as follows:

The central angle of an arc is the central angle subtended by the arc.

The measure of an arc is the measure of its central angle.Therefore,mBC = 107 degrees

The angle subtended by an arc at the center is twice the angle subtended at the circumference.

Therefore, m∠BAC = 107 / 2 = 53.5 degrees

The inscribed angle is half the intercepted arc angle.

Therefore, to find mBC, we solve:

46 = 1 / 2

Next, we cross multiply mBC  = 46 × 2

Therefore, mBC = 92 degrees

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Answer:

Step-by-step explanation:

[tex]28^{2} = 11^2 + x^2\\ 784 = 121 + x^2\\x^2 = 663\\x = 25.74\\x[/tex]≅           [tex]26[/tex]

Answer:

She spends 70 minutes in total or 1h 10min

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Answer:

La suma de los cuatro ángulos de un cuadrilátero es igual a 360 grados. Entonces, si dos ángulos miden 60° y 80°, la suma de esos ángulos es de 140 grados.

Los otros dos ángulos están en una proporción de 2:9, lo que significa que la suma de sus medidas es de 11 partes. Si representamos las medidas de estos ángulos como 2x y 9x, respectivamente, entonces podemos escribir la ecuación:

2x + 9x = 11 partes

11x = 11 partes

x = 1 parte

Por lo tanto, el ángulo más pequeño mide 2x = 2 partes o 2 × 1 = 2 grados, y el ángulo más grande mide 9x = 9 partes o 9 × 1 = 9 grados.

En resumen, los dos ángulos faltantes miden 2° y 9°.

Step-by-step explanation:

The number of total bears counted in 2002 will be: A. 1060 bears.

To determine the total bear estimate, we will use the mark-recapture formula. In this formula, we equate the number of the population to MC/R where:

M = Number marked initially

C = Number captured in the second sample

R = The recaptured number

Also, R/C = M/N

For the given problem,

M = 2008

C = 38

R = 72

So, N =  2008 * 38/72

= 1059 approximately 1060 bears.

So, the bear population will amount to 1060.

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The derivative of the function is f' ( x ) = 9 / ( 4 + 3x ) ( ln 2 )

Given data ,

Let the function be represented as f ( x )

Now , the value of f ( x ) is

f ( x ) = log₂ ( 3x + 4 )³

On simplifying , we get

On taking the derivative of the function , we get

f' ( x ) = d/dx ( log₂ ( 3x + 4 )³ )

d/dx ( log₂ ( 3x + 4 )³ ) = 1/ ln ( 2 ) [ d/dx( 3x + 4 )³ ]

On applying chain rule , we get

f' ( x ) = 1/ ln ( 2 ) 1/( 3x + 4 )³ ( 9 ( 3x + 4 )² )

So , cancelling out the similar terms , we get

f' ( x ) = 9 / ( 4 + 3x ) ( ln 2 )

Hence , the derivative is f' ( x ) = 9 / ( 4 + 3x ) ( ln 2 )

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The composite function (g - f)(2) when evaluated is 3

From the question, we have the following parameters that can be used in our computation:

f(x) = (x + 3)/(x² + 2x - 3)

Also, we have

g(x) = x + 2

The composite function (g - f)(2) is calculated as

(g - f)(2) = g(2) - f(2)

Where, we  have

g(2) = 2 + 2 = 4

Also, we have

f(2) = (2 + 3)/(2² + 2(2) - 3) = 1

So, we have

(g - f)(2) = 4 - 1

Evaluate

(g - f)(2) = 3

hence, the composite function (g - f)(2) when evaluated is 3

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It can be seen that x = (3 ± √(9 + 32√3)) / 8, which can be expressed in surd form as (3 + √(9 + 32√3)) / 8 or (3 - √(9 + 32√3)) / 8.

To find x using the sine rule, we need to solve the equation:

sine(45) / x = sine(30) / (2x + 2√3)

Simplifying this equation, we have:

(2x - 1) / x = 1 / (2x + 2√3)

Cross-multiplying and simplifying further, we get:

(2x - 1)(2x + 2√3) = x

Expanding the brackets, we have:

[tex]4x^2 + 4\sqrt3x - 2x - 2\sqrt3 = x[/tex]

Rearranging the terms and simplifying, we get:

[tex]4x^2 - 3x - 2\sqrt3 = 0[/tex]

Using the quadratic formula, we can solve for x:

x = (-(-3) ± √((-3)^2 - 4(4)(-2√3))) / (2(4))

x = (3 ± √(9 + 32√3)) / 8

Therefore, x = (3 ± √(9 + 32√3)) / 8, which can be expressed in surd form as (3 + √(9 + 32√3)) / 8 or (3 - √(9 + 32√3)) / 8.

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Answer:90

Step-by-step explanation:

Answer: ∠T=45°

Step-by-step explanation:

If triangle RST is congruent to triangle LMN, then the angles R=L, S=M, and T=N. Knowing that the sum of angles in a triangle= 180 degrees, then:

∠R+∠S+∠T=180°

∠R=65°

∠M=∠S=70°

180°-∠R-∠S=∠T

180°-65°-70°=

∠T=45°

Answer:

Step-by-step explanation:

f(x) = [tex]\frac{3+x}{x-3}[/tex]

f(a+2) = [tex]\frac{3+a+2}{a+2-3}[/tex]

f(a+2) = [tex]\frac{5+a}{a-1}[/tex]

The probability that the student was female and got grade C is P ( A ) = 0.12833

Given data ,

Let the table represent the group of students with their gender and the grades in school

Now , the probability that the student was female = total number of females / total number of students

So , probability that the student was female = 22/60

Now , the probability that the student got grade C = 21/60

So , the compound probability P ( A ) = probability that the student was female and got grade C

On simplifying , we get

P ( A ) = ( 22/60 ) ( 21/60 )

P ( A ) = 462/3600

P ( A ) = 0.12833

Hence , the probability is P ( A ) = 0.12833

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Answer:

54300 ml is greater than 54 L. This is because 54300 ml is equivalent to 54.3 L, which is larger than 54 L.

The vertex is at (1, 4).

The vertex is at (-1, -4).

The axis of symmetry is x = 1.

The axis of symmetry is x = -1.

The x-intercepts are (3, 0) and (-1, 0).

The x-intercepts are approximately (-2.3, 0) and (0.3, 0).

The y-intercept is (0, 3).

The y-intercept is (0, -6).

We have,

To solve the equations using the quadratic formula, we need to rewrite them in the standard form ax² + bx + c = 0.

-x² + 2x + 3 = 0 can be rewritten as -1x² + 2x + 3 = 0

Here, a = -1, b = 2, and c = 3

Using the quadratic formula, we have:

x = (-b ± √(b² - 4ac)) / 2a

x = (-2 ± √(2² - 4(-1)(3))) / 2(-1)

x = (-2 ± √(16)) / -2

x = 1 ± 2

So, x = 3 or x = -1

2x² + 4x - 6 = 0 is already in the standard form with a = 2, b = 4, and c = -6

Using the quadratic formula, we have:

x = (-4 ± √(4² - 4(2)(-6))) / 2(2)

x = (-4 ± √(52)) / 4

x = (-2 ± √(13)) / 2

To find the vertex of each parabola, we can use the formula x = -b / 2a and then substitute the value of x into the equation to find y.

For -x² + 2x + 3 = 0

We have a = -1 and b = 2, so the vertex is at

x = -b / 2a = -2 / (2(-1)) = 1.

Substitute x = 1 into the equation to find y:

y = -1(1)² + 2(1) + 3 = 4.

So the vertex is at (1, 4).

For 2x² + 4x - 6 = 0,

We have a = 2 and b = 4, so the vertex is at x = -b / 2a = -4 / (2(2)) = -1. Substitute x = -1 into the equation to find y: y = 2(-1)² + 4(-1) - 6 = -4.

So the vertex is at (-1, -4).

The axis of symmetry is a vertical line that passes through the vertex.

For -x² + 2x + 3 = 0, the axis of symmetry is x = 1.

For 2x² + 4x - 6 = 0, the axis of symmetry is x = -1.

To find the x-intercepts, we can set y = 0 in each equation and solve for x using the quadratic formula.

For -x² + 2x + 3 = 0, we have:

x = (-2 ± √(2² - 4(-1)(3))) / 2(-1)

x = (-2 ± √(16)) / -2

x = 1 ± 2

So the x-intercepts are (3, 0) and (-1, 0).

For 2x² + 4x - 6 = 0, we have:

x = (-4 ± √(4² - 4(2)(-6))) / 2(2)

x = (-4 ± √(52)) / 4

x = (-2 ± √(13)) / 2

So the x-intercepts are approximately (-2.3, 0) and (0.3, 0).

To find the y-intercept, we need to set x = 0 and solve for y.

Setting x = 0 in -x² + 2x + 3 = 0.

-0 + 0 + 3 = 3

Therefore, the y-intercept is (0, 3).

Setting x=0 in 2x² + 4x - 6.

2(0)² + 4(0) - 6 = -6

Therefore, the y-intercept is (0, -6).

Thus,

The vertex is at (1, 4).

The vertex is at (-1, -4).

The axis of symmetry is x = 1.

The axis of symmetry is x = -1.

The x-intercepts are (3, 0) and (-1, 0).

The x-intercepts are approximately (-2.3, 0) and (0.3, 0).

The y-intercept is (0, 3).

The y-intercept is (0, -6).

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Based on the information, the required result of the expansion for the expression is 8.

In mathematics, an expression is a combination of numbers, variables, operators, and/or functions that can be evaluated to obtain a numerical or symbolic result. Expressions can take many forms, but typically involve some combination of mathematical symbols such as +, -, ×, ÷, =, and parentheses.

The given expression is 2x-3 .

when x =1, we will get 2(1)-3 = 2-3 =-1

When x=2, we will get, 2(2) -3 = 4-3 =1

When x=3, we will get 2(3)-3 = 6-3=3

When x=4, we will get 2(4)-3 = 8-3=5

The required result of the expansion is -1+1+3+5=8

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Answer: n = 70

Step-by-step explanation:

The sum of all angles in a triangle is 180 degrees. We know this because the formula for degree measure in a polygon is (180) * (n-2) where n is the number of sides. (ie a square with 4 sides would have 360 total degrees because (180) * (4-2) = 360)

Given the angle of 40 degrees we know that the remaining angles need to add up to 140 degrees. because n = n we can say that 2n = 140 divide by 2 and get n=70

Answer:

b,x²-6x+5

Step-by-step explanation:

(f+g)(x)=f(x)+g(x)

=x²-7x+10+(x-5)

=x²-7x+10+x-5

=x²-7x+x+10-5

=x²-6x+5

The solution is, $85,500 are the total cost savings for Leather Stuff.

Explanation:

In this case, we need to calculate the saving per zipper which is external price minus agreed transfer price.

Then, we will multiply the saving per zipper by the quantity of zipper required by Leather Stuff, which is 90,000 zippers.

Cost saving per zipper

= External price - Agreed transfer price

= $3.50 - $3.25

= $0.25

Total cost saving

= $0.95 x 90,000 zippers

= $85,500

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complete question:

Quinn Inc. has a number of divisions. One division, Style, makes zippers that are used in the manufacture of boots. Another division, LeatherStuff, makes boots that use the zippers and needs 90,000 zippers per year. Style incurs the following costs for one zipper: Direct materials $0.23 Direct labor 0.20 Variable overhead 0.95 Fixed overhead 1.32 Total $2.70 Quinn has capacity to make 950,000 zippers per year, but due to a soft market, only plans to produce and sell 620,000 zippers next year. LeatherStuff currently buys zippers from an outside supplier for $3.50 each (the same price that Style receives). Assume that Style and LeatherStuff have agreed on a transfer price of $3.25. What are the total cost savings for LeatherStuff?

The points are shown on the number line as below.

The given numbers are,

-8/5 and 1.8

Now convert -8/5 into decimal form

therefore,

Divide 8 by 5 we get,

-8/5 = -1.6

Since we know that,

On a number line, arithmetic procedures can be better described. To begin, one needs understand how to locate numbers on a number line. A number line's midway point is zero.

Positive numbers occupy the right side of the zero on the number line, whereas negative numbers occupy the left side of the zero. The value of a number diminishes as we travel to the left side. 1 is greater than -2, for example.

Integers, fractions, and decimals may all be simply expressed on a number line.

The points are plotted on number line shown below.

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