A sample of 100 production workers is obtained. The workers are classified by gender (male, female) and by age (under 20, 20−29, 30−39, and 40 or over). How many degrees of freedom are there?

Answer:

C (Your chosen answer) is correct

Step-by-step explanation:

AA (Angle-Angle) Similarity postulate is exactly what it sounds like: Two triangles can be proven similar if they have two congruent angles.

We can tell what angles are congruent through the markings:

(A) and (B) can be immediately be eliminated, because one or more tringle in the pair does not have enough markings to prove congruency, so therefor cant be proven to be similar.

(D) is a little more difficult to decipher, but when you look closely, you can tell that the markings are not identical, so therefor  the angles are not congruent.

(C) is correct because it has identical markings which makes the angles congruent.

Hope this helps :)

Option C is correct because it has identical markings which makes the angles congruent by AA.

A triangle is a three-sided polygon that consists of three edges and three vertices.

Two triangles are said to be similar if their corresponding angles are congruent and the corresponding sides are in proportion .

Two triangles can be proven similar if they have two congruent angles.

Option A and B are not similar through AA because one or more tringle in the pair does not have enough markings to prove congruency, so therefore they are not similar.

Option C is correct because it has identical markings which makes the angles congruent by AA.

Hence, Option C is correct because it has identical markings which makes the angles congruent by AA.

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Answer:

2,000 children attended and 1,250 adults attended.

The equations needed to solve these problems are:

[tex]x+y=3250\\2.00x+4.50y=9625[/tex]

Step-by-step explanation:

First, set up a system of equations.  Let "x" equal the number of children who attended the class and let "y" equal the number of adults who attended the class.

Our two equations to use to solve this problem are:

[tex]x+y=3250\\2.00x+4.50y=9625[/tex]

Then, I took the first equation and I isolated the x-variable:

[tex]x+y=3250\\x+y-y=3250-y\\x=3250-y[/tex]

Then, I substituted (3250-y) in for the x-variable in the second equation and I solved for "y":

[tex]2.00x+4.50y=9625\\2.00(3250-y)+4.50y=9625\\6500-2.00y+4.50y=9625\\6500+2.50y=9625\\6500-6500+2.50y=9625-6500\\2.5y=3125\\\frac{2.5y}{2.5}=\frac{3125}{2.5}\\ y=1250[/tex]

Next, I substituted the y-value that I got in for the y-variable in the first equation:

[tex]x+y=3250\\x+1250=3250\\x+1250-1250=3250-1250\\x=2000[/tex]

Finally, now that I have found both the x-value and the y-value, I will use the values to check  in both of my equations:

Equation 1:

[tex]x+y=3250\\2000+1250=3250\\3250=3250[/tex]

It works for Equation 1.

Equation 2:

[tex]2.00x+4.50y=9625\\2.00(2000)+4.50(1250)=9625\\4000+5625=9625\\9625=9625[/tex]

It works for Equation 2.

Therefore, the values work.

That means that 2000 children attended the class and 1250 adults attended the class.

Step-by-step explanation:

Let the number is n. We need to write an expression for "seven less than the quotient of nineteen and a number"

The quotient of nineteen and a number is [tex]\dfrac{19}{n}[/tex] and 7 less than this is [tex]\dfrac{19}{n}-7[/tex]

Now if n = 2, put the value of n in above expression,

[tex]\dfrac{19}{n}-7=\dfrac{19}{2}-7\\\\=\dfrac{5}{2}\\\\=2.5[/tex]

So, the value of the above expression is 2.5 at n = 2.

Answer:

19/n-7

and 2.5

Step-by-step explanation:

If u actually read the other guy's work

Answer:

0.06

Step-by-step explanation:

The probability they go to the city playoffs is:

0.30 (or 30%)

Then assuming they have gone to the city playoffs, the probability they go to the state playoffs is 0.20 (or 20%)

The probability of both events is the product:

P(city then state) = 0.30 * 0.20 = 0.06

Answer:

0.06

Step-by-step explanation:

Answer:

Step-by-step explanation:

Given;

smallest possible length of the international soccer field, L₀ = 100 m

smallest possible breadth of the international soccer field, B₀ = 64 m

Largest possible length of the international soccer field, L₁ = 110 m

Largest possible breadth of the international soccer field, B₁ = 75 m

Area of a rectangle is given by;

A = L x B

The smallest area the field could be is calculated as;

A₀ = L₀ x B₀

A₀ = 100 m x 64 m

A₀ = 6,400 m²

The largest area the field could be is calculated as;

A₁ = L₁ x B₁

A₁ = 110 m x 75 m

A₁ = 8,250 m²

Answer:

B) -4<x<2

Step-by-step explanation:

-1 < x + 3 < 5

-3       -3      -3

-4 < x + < 2

We have some unknown number x and we're adding 3 to it getting x+3

To isolate x, we need to undo the operation happening to it. So we need to undo the addition of 3. We'll subtract 3 from all sides

-1 < x+3 < 5

-1-3 < x+3-3 < 5-3 ... subtract 3 from all sides

-4 < x+0 < 2

Answer:

48 burpees & 80 squats

Step-by-step explanation:

Let burpees= x

Let squat = y

For every 12 burpees Melinda did, she did 20 squats.

X/y =12/20

20x= 12y

X= 0.6y

Melinda did a total of 128 squats and burpees

X+y= 128

But x= 0.6y

0.6y +y= 128

1.6y= 128

Y= 128/1.6

Y= 80

X+y= 128

X+80= 128

X=128-80

X= 48

Answer:

Step-by-step explanation:

i think its 5/144=0.03472

Answer:

x = 40

Step-by-step explanation:

Adding 23 to both sides gives us:

x - 23 + 23 = 17 + 23

x = 40

Answer:

Step-by-step explanation:

[tex] \sf{x - 23 = 17}[/tex]

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

[tex] \sf{x = 17 + 23}[/tex]

Add the numbers

[tex] \sf{x = 40}[/tex]

Hope I helped!

Best regards!!

Answer:

x = 19.5, RQS=43

Step-by-step explanation:

It is important to note that RQS and TQS are supplementary, meaning their angles will add up to 180. Knowing this, we can create and solve the equation to find x..

(2x+4) + (6x+20) = 180

8x + 24 = 180

8x = 156

x = 19.5

Now that we know the value of x, we can substitute it into the equation for RQS, 2x+4.

2(19.5)+4

39+4

43

Hope this helped!

Answer:

[tex]x=19.5^o[/tex]

[tex]\angle RQS=43^o[/tex]

Step-by-step explanation:

Notice that the addition of these two angles give you and angle of [tex]180^o[/tex], therefore we can write the following equation to represent such addition:

[tex](2x+4)^o + (6x+20)^o=180^o\\2x+6x+4^o+20^o=180^o\\8\,x+24^o=180^o\\8\,x=180^o-24^o\\8\,x=156^o\\x=156^o/8\\x=19.5^o[/tex]

Therefore, the value of the angle RQS is:

[tex]\angle RQS=(2\,x+4)^o=(2\,*\,19.5^o)+4^o=43^o[/tex]

Answer:

D. X = 31

Step-by-step explanation:

[tex]4x = 124 \\ x = \frac{124}{4} \\ x = 31[/tex]

Answer:

60, 120 and 180.

Step-by-step explanation:

It maps onto itself every 60 degrees.

So as they are multiples of 60 it will map onto itself at 120 and 189 degrees also.

The measure of the angle by which David can rotate the hexagon to map it onto itself is 60°, 120°, and 180°. The correct options are C, D, and E.

When two straight lines or rays intersect at a shared endpoint, an angle is generated. An angle's vertex is the common point of contact. Angle is derived from the Latin word angulus, which means "corner."

Given that David uses drawing software to rotate the regular hexagon about its center. Now, since the measure of the center angle of a hexagon made by any of its sides is 60°.

Further, if the hexagon is rotated by any angle that is divisible by 60° then it will result in the same hexagon.

Hence, the measure of the angle by which David can rotate the hexagon to map it onto itself is 60°, 120°, and 180°.

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Answer:

D. -2/5

Step-by-step explanation:

Slope=  [tex]\frac{delta Y}{Delta X} =\frac{-2}{5}[/tex]

Answer:

D

Step-by-step explanation:

Calculate the slope m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = (- 1, 4) and (x₂, y₂ ) = (14, - 2)

m = [tex]\frac{-2-4}{14+1}[/tex] = [tex]\frac{-6}{15}[/tex] = - [tex]\frac{2}{5}[/tex] → D

Hey there! I'm happy to help!

We have two values for y. Since y=y, this means that −2x + 4 and − 1/3x − 1 are equal as well, so we can put them in an equation and solve for x.

−2x + 4 = − 1/3x − 1

We subtract 4 from both sides.

-2x=-1/3x-5

We add 1/3 x to both sides.

-5/3x=-5

We divide both sides by -1 2/3.

x=3

Now, we plug this into one of the original equations to find y.

y=-2(3)+4

y=-6+4

y=-2

Therefore, the solution is (3,-2) or x=3 and y=-2.

I hope that this helps! Have a wonderful day! :D

Answer:

81.86%

Step-by-step explanation:

We are given that the mean GPA of students in a course at UC Davis is 3.2 with a standard deviation of 0.3.

Assuming that the data follows normal distribution.

Let X = GPA of students in a course at UC Davis

So, X ~ Normal()

The z score probability distribution for normal distribution is given by;

                              Z  =   ~ N(0,1)

where,  = population mean GPA = 3.2

           = standard deviation = 0.3

Now, the probability that the students in the course have a GPA between 2.9 and 3.8 is given by = P(2.9 < X < 3.8)

       P(2.9 < X < 3.8) = P(X < 3.8) - P(X  2.9)

       P(X < 3.8) = P(  <  ) = P(Z < 2) = 0.97725

       P(X  2.9) = P(    ) = P(Z  -1) = 1 - P(Z < 1)

                                                        = 1 - 0.84134 = 0.15866

The above probability is calculated by looking at the value of x = 2 and x = 1 in the z table which has an area of 0.97725 and 0.84134 respectively.

Therefore, P(2.9 < X < 3.8) = 0.97725 - 0.15866 = 0.8186

Hence, 81.86% of students in the course have a GPA between 2.9 and 3.8.

Answer:

5x² + 2x - 15 = 0

Step-by-step explanation:

Given

[tex]\frac{6}{x}[/tex] = 2x + [tex]\frac{4}{5}[/tex]

Multiply through by 5x ( common denominator )

30 = 10x² + 4x ( subtract 30 from both sides )

0 = 10x² + 4x - 30 ( divide through by 2 )

0 = 5x² + 2x - 15 , that is

5x² + 2x - 15 = 0

Answer:

We need to find the value of the expression when d=3. Substitute d=3 in the above expression. Hence, the value of the expression at d=3 is 73.

this is similar answer of your question

Answer: C

Step-by-step explanation:

The formula to find average rate of change is [tex]\frac{f(b)-f(a)}{b-a}[/tex]. Since the problem is asking for the average rate of change from the second to fifth year, we plug in a=2 and b=5.

[tex]\frac{f(5)-f(2)}{5-2}[/tex]

f(5)=420.4

f(2)=408.04

[tex]\frac{420.4-408.04}{5-2}=4.12[/tex]

Now, we get 4.12 dollars per year for the average rate of change.

Answer:520 billion

Step-by-step explanation:

Answer: 2.00e5

Step-by-step explanation:

Answer:

Step-by-step explanation:

f(x) = cx + d

For the first equation

f(50) = 27,000

Substitute the value of x that's 50 into the expression

That's

50c + d = 27,000

For the second equation

f(100) = 38,000

Substitute the value of x that's 100 into the expression

We have

100c + d = 38,000

Subtract the first equation from the second one to eliminate d

That's

100c - 50c + d - d = 38,000 - 27,000

50c = 11,000

Divide both sides by 50

We have the final answer as

Hope this helps you

The equation is y = x +3 .

We have to check which one of the option does not fulfill the given equation .

Taking 1st option :-

Where x = -10 and y = -7

→ -7 = - 10 +3

→ -7 = -7

Hence this lies on graph.

Taking 2nd option :-

Where x = 13 and y = 16

→ 16 = 13 + 3

→ 16 = 16

It also lies on graph .

Taking 3rd option :-

→ Where x = -14 and y = -11

→ -11 = -14 +3

→ -11 = -11

This will also lie on graph .

Taking 4th option :-

Where x = -20 and y = 17

→ 17 = -20 + 3

→ 17 = 17

This will also gonna lie on graph .

Answer: We have an odd number of pennies.

Step-by-step explanation:

So we have N pennies.

When we wan to divide the N pennies into groups of 2, we have a penny left over.

This means that N is not divisible by 2.

The problem is that there are infinite natural numbers that are not divisible by two, this is the set of odd numbers.

And remember that an odd number can be written as:

N = 2*k + 1.

where k is an integer.

Then we want to divide this by 2 (divide N into groups of 2)

we have:

N/2 = (2*k + 1)/2 = 2*k/2 + 1/2 = k + 1/2.

So we have k groups of 2 pennies, and a penny leftover that we can not divide into two.

Answer:

1. 68% owned a TV

2. 20,000.00

Step-by-step explanation:

1. answer is in the question

2. if Ansah got 5,000.00 more that Bondu that means Ansah is 5, if Ansah is 5 and gets 5,000.00 more that means the difference of 1 is 5,000.00 or 1= 5,000.00

4*5,000.00 = 20,000.00

Answer:

-4x-7

Step-by-step explanation:

Add like terms, aka the Xs and the normal numbers

Answer:

  B.  y = 4/3x + 1

Step-by-step explanation:

The offered choices are in slope-intercept form:

  y = mx + b

where m represents the slope (rise/run) and b represents the y-intercept.

The graph crosses the y-axis at y=1, so the y-intercept is +1. That eliminates choices A and D.

The slope is greater than 1, so choice C is eliminated. You know the slope is greater than 1 because the line goes up more than 1 unit for a 1-unit change to the right. If you look where the line crosses grid points, you see that it rises 4 units for a run of 3 units to the right. That means ...

  m = rise/run = 4/3

The equation is ...

  y = 4/3x +1 . . . . matches choice B

Answer:

B. y = 4/3x + 1

Step-by-step explanation:

First, find the slope using rise/run (y2 - y1) / (x2 - x1)

Use the points (0, 1) and (3, 5)

Plug in the numbers:

(5 - 1) / (3 - 0)

= 4/3

Looking at the graph, we can see the y intercept is (0, 1) so we can plug in 1 into the equation y = mx + b as b:

y = mx + b

y = 4/3x + 1

Answer:

perimeter =  4z - 8

Step-by-step explanation:

perimeter of a square box = 4 times the side

P = 4 ( z - 2)

P = 4z - (4*2)

P = 4z - 8

For number 5 - .3 ( 3.60 ÷ 12 = .3)

For number 6 - .32 ( 2.56 ÷ 8 = .32)

For number 7 - 2 ( 2.36 ÷ 2 = 1.18)

Answer:

35.71%

Step-by-step explanation:

So, let's determine the number of jobs the industry will have in 2030.

So, in 2020, the industry has 123,200 jobs.

Each year, the industry loses 4,400 jobs.

Thus, by 10 years in (2030), the industry would have lost (4,400)(10) or 44,000 jobs.

This means that in 2030, there will only be 123,200-79200 jobs left.

Now, percentage change is given by:

[tex]PC=\frac{New-Old}{Old}\cdot100\%[/tex]

The new value is 79200 and the old value is 123,200. Substitute them:

[tex]PC=\frac{(79200)-(123200)}{123200}\cdot100\%\\[/tex]

Use a calculator. Simplify:

[tex]PC=\frac{-44000}{123200}\cdot100\%\\ PC\approx-0.3571\cdot100\%\\PC\approx-35.71\%[/tex]

If the result is negative, then it's a decrease. Therefore, the percentage change from 2020 to 2030 is approximately 35.71%

Answer:

The answer is 35.71%

Step by step explanation

In 2020 the industry has 123,200 jobs.

Each year, the industry loses 4,400 jobs.

Thus, by 10 years in (2030), the industry would have lost (4,400)(10) or 44,000 jobs.

This means that in 2030, there will only be 123,200-79200 jobs left.

Now, percentage change is given by:

New−Old

⋅100%

The new value is 79200 and the old value is 123,200. Substitute

123200

(79200)−(123200)

⋅100%

Simplify:

PC≈−0.3571⋅100%

PC≈−35.71%

the percentage change from 2020 to 2030 is 35.71%

Answer:

[tex]\displaystyle \int\limits^{\frac{1}{2}}_0 \int\limits^{4 - 8x}_0 \int\limits^{4 - 8x - y}_0 {} \, dz \ dy \ dx = \frac{4}{3}[/tex]

General Formulas and Concepts:

Calculus

Integration

Integration Rule [Reverse Power Rule]:                                                           [tex]\displaystyle \int {x^n} \, dx = \frac{x^{n + 1}}{n + 1} + C[/tex]

Integration Rule [Fundamental Theorem of Calculus 1]:                                 [tex]\displaystyle \int\limits^b_a {f(x)} \, dx = F(b) - F(a)[/tex]

Integration Property [Multiplied Constant]:                                                     [tex]\displaystyle \int {cf(x)} \, dx = c \int {f(x)} \, dx[/tex]

Integration Property [Addition/Subtraction]:                                                   [tex]\displaystyle \int {[f(x) \pm g(x)]} \, dx = \int {f(x)} \, dx \pm \int {g(x)} \, dx[/tex]

Multivariable Calculus

Integration

Fubini’s Theorem [Box]:                                                                                     [tex]\displaystyle \iiint_R{f(x, y, z)} \, dV = \int\limits^{b_1}_{a_1} \int\limits^{b_2}_{a_2} \int\limits^{b_3}_{a_3} {f(x, y, z)} \, dx \, dy \, dz[/tex]

Volume Formula:                                                                                               [tex]\displaystyle V = \iiint_D \, dV[/tex]

Step-by-step explanation:

Step 1: Define

Identify.

Given: Tetrahedron Solid

Function: 8x + y + z = 4 and coordinate planes x, y, and z

Step 2: Find Volume Pt. 1

Find limits of integration for each variable.

Step 3: Find Volume Pt. 2

∴ the volume of the given tetrahedron solid is equal to 4/3.

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Topic: Multivariable Calculus

Unit: Triple Integrals

Answer:

The expression is T = b+s

Step-by-step explanation:

If b represents the number of bikes and s represents the number of skateboards Donte is planning to repair to save up money for college, the total number of things he can repair in a day will be expressed as the sum of number of bikes and number of skateboards i.e b+s = T

Given that He can repair up to 2 bikes per day, the total and 4 skateboards per day this means that b = 2 and s = 4

Total number of thing's he can repair in a day given this amount T = 2 + 4 = 6 things