brass is an alloy created using $80\%$ copper and $20\%$ zinc. if henri's brass trumpet contains $48$ ounces of copper, how many ounces of zinc are in the trumpet?

Answer:

[tex]f(g(x)) = \boxed{\dfrac{x}{2}}[/tex]

[tex]g(f(x)) = \boxed{2x - 5}[/tex]

Step-by-step explanation:

We have the following two functions
[tex]f(x) = \dfrac{1}{x-5}\\\\g(x) = \dfrac{2}{x}+\:5[/tex]

To find [tex]f(g(x))[/tex]  substitute the expression for [tex]g(x)[/tex]  wherever you see an [tex]x[/tex] in [tex]f(x)[/tex]

[tex]\mathrm{For}\:f=\dfrac{1}{x-5}\:\mathrm{substitute}\:x\:\mathrm{with}\:\dfrac{2}{x}+5[/tex]

[tex]=\dfrac{1}{\dfrac{2}{x}+5-5}\\\\[/tex]

[tex]=\dfrac{1}{\dfrac{2}{x}}\\\\\\= \dfrac{x}{2}[/tex]    ANSWER

To find [tex]g(f(x)[/tex], substitute the expression for [tex]f(x)[/tex]  wherever you see an [tex]x[/tex] in [tex]g(x)[/tex]

[tex]\mathrm{For}\:g=\dfrac{2}{x}+5\:\mathrm{substitute}\:x\:\mathrm{with}\:\dfrac{1}{x-5}\\\\=\dfrac{2}{\dfrac{1}{x-5}}+5\\\\[/tex]

[tex]=2\left(x-5\right)+5\\\\= 2x - 10 + 5\\\\= 2x - 5\\\\[/tex]ANSWER

Note:

[tex]\dfrac{2}{\dfrac{1}{x-5}}=2\left(x-5\right)\\\\[/tex]

The percentage of the 90 students on the Springfield High School varsity soccer team who are seniors is 31%.

The percentage is a portion of a whole number or value.

Using percentages is a way of expressing values compared to others in relative terms.

The percentage refers to the ratio, which is obtained as the quotient of a numerator and a denominator, which is then multiplied by 100.

The total number of students on the Springfield High School varsity soccer team = 90

The makeup of the soccer team = freshmen, sophomores, juniors, and seniors

The number of seniors on the soccer team = 28

The percentage of seniors on the soccer team = 31.11% (28/90 x 100)

Thus, we can conclude that about 31 percent of the soccer team consists of seniors.

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Answer: Since he is in school for 5 days a week, in a school week he will have a balance of 25.

Step-by-step explanation:

Answer:-20

Step-by-step explanation:

2,352,071.15 ft^3 is closest to the volume, in cubic feet, of the sphere .

What does sphere refer to?

The shape and symmetry of a sphere are both round. All of its surface points are equally spaced from the center, making it a three-dimensional solid. Depending on the radius, it has a surface area and a volume.

The volume of a sphere = 4/3 π r^3    where r is the radius.

Here the radius = 1/2 * 165 = 82.5 ft.

So the volume  = 4/3 π (82.5)^3

= 2,352,071.15 ft^3

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54.6 Btu is the value of 57,281 joules in btus .

What does Jule mean?

A measure of energy or work that is equivalent to the work completed by a force of one newton moving through a distance of one meter The term "joule" is frequently used in the context of physics to refer to units of energy.

                     Lifting an apple, which weighs roughly one Newton, is one example used to demonstrate a joule. One joule of work is expended if you lift the apple one meter into the air.

The conversion used from Joules to Btu is:

1 Btu = 1055.06 J

or,

 1J = 1/1055.06  Btu

 given that the energy 57281 J. Now we have to determine the energy in Btu.

As,    1J = 1/1055.06  Btu

      57281J = 57281J/1J * 1/1055.06 Btu

              = 54.6 Btu

Therefore, the correct option is, (B) 54.3 Btu.

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Answer: 54.3 Btus

Step-by-step explanation:

The absolute value is also called a modulus.

The absolute value (or modulus) | x | of a real number x is the non-negative value of x without regard to its sign, also describes the distance from zero that a number is on the number line, without considering direction.

It is represented as |a|, which defines the magnitude of any integer ‘a’.

Absolute value is a term used in mathematics to indicate the distance of a point or number from the origin (zero point) of a number line or coordinate system.

it defines removing any negative sign in front of a number and thinking of all numbers as positive.

When x itself is negative (x<0), then its absolute value is necessarily positive

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Answer:  x(2 - xy² - y - y²)

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

                             y²

Step-by-step explanation:

Please give brainliest

x(2 - xy² - y - y²)/y² is the answer

Answer:

(I'm not exactly sure which way you wanted it, so see the answers below!)

Step-by-step explanation:

Answer:

22

Step-by-step explanation:

All sides of a rhombus are congruent.

[tex]11w=w+20 \\ \\ 10w=20 \\ \\ w=2 \\ \\ \implies VW=2(11)=22[/tex]

If he left home 50 minutes before the class started he was 53.7 minutes late for his class.

Given that,

Speed of the bike = 16 feet per second = 10.9091 miles/hour

Distance from home to bus stop = 5 miles

Total time taken to reach bus stop = distance/ speed = 5 miles/10.9091 miles/hour= 0.458 hours = 27.5 minutes

Then, speed of the bus = 25 miles per hour

Distance from bus stop to campus = 25 miles

Total time taken to reach campus = distance/ speed = 25 miles/25 miles/hour= 1 hour= 60 minutes

Then, speed of the bike = 16 feet per second = 10.9091 miles/hour

Distance from campus to bike rack = 480 yards =  0.2727 miles

Total time taken to reach bike rack = distance/ speed = 0.2727 miles/ 10.9091 miles/hour= 0.249 hour= 15 minutes (approximately)

Then, the Speed of walking = 2.5 miles per hour

Distance from bike rack to class = 250 feet =  0.047 miles

Total time taken to reach class = distance/ speed = 0.047 miles/ 2.5 miles/hour= 0.0188 hour= 1.2 minutes (approximately)

Thus, total time taken to reach class = 27.5 minutes+60 minutes+15 minutes+1.2 minutes = 103.7 minutes
Therefore, If he left home 50 minutes before the class started he was 53.7 minutes late for his class.

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Answer: 8/100 or 2/25

Step-by-step explanation:

8% is automatically out of 100% so it would be

8/100

and the simplified version would be 2/25

Answer: 2/25

Step-by-step explanation:

Answer:

Step-by-step explanation:

Cross multiply

(2x + 6 + 2x)/(x² + 3x) = 1

(4x + 6) = x² + 3x

x² - x - 6 = 0

x² - 3x + 2x - 6 = 0

x(x - 3) + 2(x - 3) = 0

(x + 2)(x - 3) = 0

x = -2,3

Therefore , the solution of the given problem of angles comes out to be

r1 (1) = r2.

An angle is a form in Euclidean geometry composed of two rays, called the hook's flanks, that converge at a point in the middle known as the vertex of the angle. In the plane that they are located, two ray may combine to make an angle. The collision of two planes also produces an angle. Dihedral angles are what we call them.

Here,

Make the pair of elements

r1 (t) = r2 (s) t = 7 - s

or

t + s = 7 equal to one another.

35 + t2 = s2, or 35 - t2 = 4, or s2 - t2 = 35

Step 2: Using the t value from equation 1, simplify equation 3.

35 + ( 7 - s ) ( 7 - s )

2 = s2 14s = 84 s = 6 and t = 1 are equivalent to.

Step 3: In formulas (1), (2), and, substitute these values of "t" and "s"

(3).

r1 (1) = r2

(6) = (1, 3, 36) (1, 3, 36)

Therefore , the solution of the given problem of angle comes out to be

r1 (1) = r2.

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Each side of the playground is 10[tex]\sqrt{2}[/tex] m.

We know that in a square,

                               d = [tex]\sqrt{2}[/tex] a

            where, d = diagonal of the square

                         a = side of the square

Now, according to the question the walkway forms a diagonal and is 20 meters long.

  So, d = 20 m

        a = ?

          d = [tex]\sqrt{2}[/tex] a

        20 =   [tex]\sqrt{2}[/tex] a

          a  =  20/ [tex]\sqrt{2}[/tex]

              =  [tex]\frac{10\sqrt{2}*\sqrt{2} }{\sqrt{2}}[/tex]

              = [tex]10\sqrt{2}[/tex]

Hence, the side of the playground is [tex]10\sqrt{2}[/tex] meters long.

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Answer:

See attachment.

Step-by-step explanation:

If CD and MB are parallel, triangle CDE is similar to triangle MBE.

In similar triangles, corresponding sides are always in the same ratio.

[tex]\implies \sf CD:MB=DE:BE=EC:EM[/tex]

From inspection of the given diagram, EM is approximately 0.35 times the length of EC.  Therefore, let EC = 10 and EM = 3.5.

The sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

Therefore, let CD = 7 and let DE = 12.

Substitute these values into the created ratio equation:

[tex]\implies \sf 7:MB=12:BE=10:3.5[/tex]

[tex]\implies \sf \dfrac{7}{MB}=\dfrac{12}{BE}=\dfrac{10}{3.5}[/tex]

Calculate BE:

[tex]\implies \sf \dfrac{12}{BE}=\dfrac{10}{3.5}[/tex]

[tex]\implies \sf \dfrac{12 \cdot 3.5}{10}=BE[/tex]

[tex]\implies \sf BE=4.2[/tex]

Calculate MB:

[tex]\implies \sf \dfrac{7}{MB}=\dfrac{10}{3.5}[/tex]

[tex]\implies \sf \dfrac{7 \cdot 3.5}{10}=MB[/tex]

[tex]\implies \sf MB=2.45[/tex]

Therefore:

[tex]\implies \sf CM=EC-EM[/tex]

[tex]\implies \sf CM=10-3.5[/tex]

[tex]\implies \sf CM=6.5[/tex]

[tex]\implies \sf DB=DE-BE[/tex]

[tex]\implies \sf DB=12-4.2[/tex]

[tex]\implies \sf DB=7.8[/tex]

Graphs, tables and equations that  can be used to find the ratio and the ratio is not constant when the relationship is non-proportional  explanation is given below

let us consider the , The graph of a linear equation is a line.

then , If b = 0 in a linear equation (so y = mx), then the equation is said to be proportional linear relationship between y and x.

If b ≠ 0, then y = mx + b is said to be  non-proportional linear relationship between y and x.

If we are able to draw a straight line through all three points and the line that passes through the origin, (0, 0), in an  ordered pairs which  represents a proportional relationship. in which the Solution to the points on the graph that  represent a proportional relationship. Such that the ordered pairs in the table represent a proportional relationship .Non-Proportional: How to tell the difference: A proportional graph is a straight line that always goes through the origin. A non-proportional graph is a straight line that does not go through the origin. As that of  adjectives the difference between proportional and  which is equal to  that proportional is at a constant ratio (to) two magnitudes (numbers) are said to be proportional if the second graph  varies in a direct relation arithmetically , the first while equal which is (label) the same as  in all respects.

The Difference in the  Proportional and linear functions are almost identical in their representation  form. The only difference is the addition of the “​b​” as constant to the linear function. Indeed, which is  a proportional relationship to a linear relationship where ​b​ = 0, or also said in an another way, in which the  line passes through the origin (0, 0).

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The price difference between the two different frame sizes £25.

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides. LHS = RHS is a common mathematical formula.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given:

let the price for small frame be x.

and, the price for large frame be y.

As, One small picture frame and one large frame costs £65.

It costs £170 to buy two of the larger frames and four of the smaller frames.

So, the system of equation are:

x+ y = 65..................(1)

4x+ 2y = 170

2x + y = 85.....................(2)

Solving equation (1) and (2) we get

2x + 65 -x = 85

x = 20

and, y = 65- 20 = 45

Hence, the difference if of £25.

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The  718.85 < x inequality says that : He must print 719 photos or more.

Inequality:

In mathematics, an inequality is a relationship in which two numbers or other mathematical expressions compare unequal. Most commonly used to compare two numbers on the number line based on size. There are several notations used to represent various types of inequalities.

Given,

In the question:

Rick bought a photo printer and supplies for $186. 90, which will allow him to print photos for $0. 29 each.

and, A photo store charges $0. 55 to print each photo.

To find the how many photos must Rick print before his total cost is less than getting prints made at the photo store?

Now,

According to the question:

Let the photos be x

Rick bought a photo printer be $186.90

A photo store charges $0. 55 to print each photo.

The question is based on inequality:

Photo Printer <  photo store

1.86.90 + 0.29x <  0.55x

            - 0.29x     - 0.29x

______________________

           1.86.90    < 0.26x

Divide by 0.26x on both sides = 718.85 < x

Hence, The  718.85 < x inequality says that : He must print 719 photos or more.

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Answer:

  4y

Step-by-step explanation:

You want the simplified form of -√(16y²) if y < 0.

The square root function returns the positive root, so this is ...

  [tex]-\sqrt{16y^2}=-4|y|[/tex]

The absolute value changes the sign of its negative arguments, so this is ...

  [tex]-4|y| = -4(-y) = \boxed{4y}\qquad\text{for $y < 0$}[/tex]

Answer: one is 10 and one is 12. Holy why was this so hard shouldn't this be as SAT/ACT problem?

Step-by-step explanation: 1/X + 1/X+2 = 11/60. THEN DO ALGEBRA THAT TOOK ME FOREVER IT WAS SO HARD.

With substitution, you need to solve one of the equations for one of the unknown variables and substitute that value into one of the other equations, then solve for the remaining unknown variable.

To solve a 3 equation problem, you can use elimination or substitution. With elimination, you need to add or subtract the equations to eliminate one of the unknown variables. With substitution, you need to solve one of the equations for one of the unknown variables and then substitute that value into one of the other equations. You can then solve for the remaining unknown variable.

To solve a 3 equation problem, you can use elimination or substitution methods. With elimination, you need to add or subtract the equations to eliminate one of the unknown variables. With substitution, you need to solve one of the equations for one of the unknown variables and substitute that value into one of the other equations, then solve for the remaining unknown variable.

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Answer:

Let's call the number we're trying to find "x".

We know that 35% of x is 77, so we can set up the equation:

0.35x = 77

We also know that 90% of x is 198, so we can set up another equation:

0.9x = 198

We can use the first equation to find the value of x and then substitute that value into the second equation to find 55% of x.

To find x, we divide both sides of the first equation by 0.35:

x = 77 / 0.35 = 220

Now that we know x is 220, we can find 55% of x by multiplying 220 by 0.55:

0.55x = 220 * 0.55 = 121

So 55% of the number is 121.

Answer:

121

Step-by-step explanation:

Because one of the answers is already divisible by 10, allowing us to find 100% of the unknown number, we can first find 10% by dividing the 90% number by 9. 198/9 is 22, meaning 22 is 10% of the number. We can then multiply it by 10 to get 100%, 22(10)=220. Meaning our full number is 220

From here we can simply multiply by our desired percentage, which is 55%. In order to multiply by a percent, you have you divide the percent by 100 to get .55. From there you can do 220*.55= 121. Meaning our answer is 121.

Jaidee's printing company LLC has 8 of Model A and 5 of Model B press, respectively.

We can find each type of press with the help of the substitution method.

Let Model A = x presses

Model B = y presses

According to the question, the company owns 13 total printing presses, then

x + y = 13

x = 13 - y

Also, according to the question

80x + 30y = 790

Put the value of x = 13 - y in the above equation

80(13 - y) + 30y = 790

1040 - 80y + 30y = 790

1040 - 790  = 80y - 30y

50y = 250

y = 250/50 = 5

Now, put the value of y in x = 13 - y

x = 13 - 5

x = 8

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The match from the simplified answer are;

1. 3x³ + 2x + 10

2. 2x² - 4x + 7

3. 3x³ -6x² - 2x + 7

4. 7x³ + 6x² -4x + 7

Algebraic expressions are described as expression that is composed of factors, constants, variables, terms and coefficients.

These algebraic expressions are also composed of mathematical operations, such as;

From the information given, we have that;

(3x³ + 10x² + 2x) - (10x² + 7x - 10)

expand the bracket

3x³ + 2x + 10

(7x² -12x + 4) - (5x² - 8x -3)

expand the bracket

2x² - 4x + 7

(5x³ - 3x + 7) - (2x³ + 6x² -x )

expand the bracket

3x³ -6x² - 2x + 7

(5x³ -3x + 7) +(2x³ +6x² - x)

expand the bracket

7x³ + 6x² -4x + 7

Hence, the expressions are 3x³ + 2x + 10, 2x² - 4x + 7, 3x³ -6x² - 2x + 7 and 7x³ + 6x² -4x + 7

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Answer:

410cm^3

Step-by-step explanation:

The Volume of the upper rectangular prism is 10x3x8 which is 240

The volume of the middle prism is 6x5x3 which is 90

And the volume of the bottom prism is 8x2x5 which is 80

If you add them all up, the total volume is 410

Note(The volume of a rectangular prism is base x height x width)

Answer:

(a) (9 , 5)

(b) (-9 , -5)

Step-by-step explanation:

When you are reflecting over the y-axis, you are changing the sign of the x value.

When you are reflecting over the x-axis, you are changing the sign of the y value.

1) Reflect the point (-9 , 5) across the y-axis.

Based on the rule stated above, when you reflect over the y-axis, you are changing the x value sign:

(x , y) = (-9 , 5)

Reflected over the y-axis: (-9 , 5) becomes (9 , 5).

2) reflect the point (-9 , 5) across the x-axis.

Based on the rule stated above, when you reflect over the x-axis, you are changing the y-value sign:

(x , y) = (-9 , 5)

Reflected over the x-axis: (-9, 5) becomes (-9 , -5).

~

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Answer:

Reflected across the y-axis:  (9, 5)

Reflected across the x-axis:  (-9, -5)

Step-by-step explanation:

The mapping rule for a reflection across the y-axis is:

Therefore, point (-9, 5) reflected across the y-axis is (9, 5).

The mapping rule for a reflection across the x-axis is:

Therefore, point (-9, 5) reflected across the x-axis is (-9, -5).

So on solving the provided question we can say we can plotting data by x = 0.83; y = 0.79; z = 0.83

The most typical approach to display data using a chart is a graph that shows the relationship between two additional variables. Diagrams created by hand or on a computer are also acceptable. Move 2 units to the right after starting at the origin before going 3 units up. The coordinates for the points 2, 3, should be shown on the coordinate plane. Clearly state your points. The pink dot with the letter P thus stands for 2.3. Before creating a line chart, you need first generate a number line for each value in your data collection. Put an X (or dot) over each value of the data on the number line after that. For each instance when a value appears in a record, place an X over the corresponding number.

x = 0.83

y = 0.79

z = 0.83

xa = 0.85

ya = 0.85

za = 0.85

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Answers to all the questions form 1 to 10 are illustrated below.

The circumference of a circle is the distance around the circle which is 2πr.

The diameter of a circle is the largest chord that passes through the center of a circle it is 2r.

We know the angle formed at the center of a circle is twice the angle formed at the circumference.

Answering each one in short.

1. x = 136/2 = 68°.

2. x = 146/2 = 73°.

3. x = 2×49 = 98°.

4. x = 2×62° = 124°.

5. As m∠O = 100°, x = 100/2 = 50°.

6. m∠O = 360 - 100 - 150 = 110°, x = 110/2 = 55°.

We know the angle formed by the same chords at the circumference is equal in measure.

7 . x = 18°.

8. x = 27°.

9. x = 180 - 55 - 90 = 35°.

10. x = 180 - 12 - 91 = 77°.

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