Each good worker can paint my new house alone in 12 hours. Each bad worker can paint my house alone in 36 hours. I need my house painted in 3 hours. If I can only find 3 good workers, how many bad workers must I also find in order to have my house painted on time?

Pls give explanation

Answers

Answer 1

In 3 hours, one good worker can paint one fourth of your house. Three good workers can thus paint three fourths of your house in three hours, leaving one fourth to be done by bad workers.

One bad worker can paint one twelfth of your house in 3 hours. There are three twelfths in one fourth, so you will need to hire three bad workers to have your house painted on time.


Related Questions

What is the mode?
1 4 4 1 1 0 6 6 6 1

Answers

The mode is 1.

It was repeated 4 times whereas 6 was only repeated 3 times, 4 twice, and 0 once.

Answer: 1

The mode is the number that occurs the most within the set of numbers. If the set of numbers is as follows: 1, 4, 4, 1, 1, 0, 6, 6, 6, 1, then the answer is one(1).

However, if the set of numbers appear as follows: 14, 41, 10, 66, 61, then there is no mode.

Hunter read 12 books in 2 months. If he reads at a constant rate, how many books did
he read in one month? Give your answer as a whole number or a FRACTION in
simplest form.
PLS ANSWER QUICK

Answers

Answer:Hunter read 6 months in a month

Step-by-step explanation:

12/2=6 books in a month

Answer:

6 Books a Month

Step-by-step explanation:

12 / 2 = 6

please help!

does the circle have a radius or diameter?

Answers

Answer:

the circle has a radius

Step-by-step explanation:

Select the functions that have identical graphs.
1 Y = cosx
2 cos(x-5pi/2)
3) sinx​

Answers

Answer: 2 and 3 B

Step-by-step explanation:

Y=cos(x-5pi/2), y=sinx

PLEASE HELP ME look at he file i put in please help

Answers

Answer:it would need to be 5

It would need to be five

Write an ordered pair that is a solution to the equation of the line y=x+5

Answers

Answer:

(1,6)

(2,7)

(4,9)

(8,13)

Step-by-step explanation:

The graph of f(x)= 3/1+x^2 is shown in the figure to the right. Use the second derivative of f to find the intervals on which f is concave upward or concave downward and to find the inflection points of f.

Answers

Answer:

Concave Up Interval: [tex](- \infty,\frac{-\sqrt{3} }{3} )U(\frac{\sqrt{3} }{3} , \infty)[/tex]

Concave Down Interval: [tex](\frac{-\sqrt{3} }{3}, \frac{\sqrt{3} }{3} )[/tex]

General Formulas and Concepts:

Calculus

Derivative of a Constant is 0.

Basic Power Rule:

f(x) = cxⁿf’(x) = c·nxⁿ⁻¹

Quotient Rule: [tex]\frac{d}{dx} [\frac{f(x)}{g(x)} ]=\frac{g(x)f'(x)-g'(x)f(x)}{g^2(x)}[/tex]

Chain Rule: [tex]\frac{d}{dx}[f(g(x))] =f'(g(x)) \cdot g'(x)[/tex]

Second Derivative Test:

Possible Points of Inflection (P.P.I) - Tells us the possible x-values where the graph f(x) may change concavity. Occurs when f"(x) = 0 or undefinedPoints of Inflection (P.I) - Actual x-values when the graph f(x) changes concavityNumber Line Test - Helps us determine whether a P.P.I is a P.I

Step-by-step explanation:

Step 1: Define

[tex]f(x)=\frac{3}{1+x^2}[/tex]

Step 2: Find 2nd Derivative

1st Derivative [Quotient/Chain/Basic]:                           [tex]f'(x)=\frac{0(1+x^2)-2x \cdot 3}{(1+x^2)^2}[/tex]Simplify 1st Derivative:                                                           [tex]f'(x)=\frac{-6x}{(1+x^2)^2}[/tex]2nd Derivative [Quotient/Chain/Basic]:     [tex]f"(x)=\frac{-6(1+x^2)^2-2(1+x^2) \cdot 2x \cdot -6x}{((1+x^2)^2)^2}[/tex]Simplify 2nd Derivative:                                                       [tex]f"(x)=\frac{6(3x^2-1)}{(1+x^2)^3}[/tex]

Step 3: Find P.P.I

Set f"(x) equal to zero:                    [tex]0=\frac{6(3x^2-1)}{(1+x^2)^3}[/tex]

Case 1: f" is 0

Solve Numerator:                           [tex]0=6(3x^2-1)[/tex]Divide 6:                                          [tex]0=3x^2-1[/tex]Add 1:                                              [tex]1=3x^2[/tex]Divide 3:                                         [tex]\frac{1}{3} =x^2[/tex]Square root:                                   [tex]\pm \sqrt{\frac{1}{3}} =x[/tex]Simplify:                                          [tex]\pm \frac{\sqrt{3}}{3} =x[/tex]Rewrite:                                          [tex]x= \pm \frac{\sqrt{3}}{3}[/tex]

Case 2: f" is undefined

Solve Denominator:                    [tex]0=(1+x^2)^3[/tex]Cube root:                                   [tex]0=1+x^2[/tex]Subtract 1:                                    [tex]-1=x^2[/tex]

We don't go into imaginary numbers when dealing with the 2nd Derivative Test, so our P.P.I is [tex]x= \pm \frac{\sqrt{3}}{3}[/tex] (x ≈ ±0.57735).

Step 4: Number Line Test

See Attachment.

We plug in the test points into the 2nd Derivative and see if the P.P.I is a P.I.

x = -1

Substitute:                    [tex]f"(x)=\frac{6(3(-1)^2-1)}{(1+(-1)^2)^3}[/tex]Exponents:                   [tex]f"(x)=\frac{6(3(1)-1)}{(1+1)^3}[/tex]Multiply:                        [tex]f"(x)=\frac{6(3-1)}{(1+1)^3}[/tex]Subtract/Add:              [tex]f"(x)=\frac{6(2)}{(2)^3}[/tex]Exponents:                  [tex]f"(x)=\frac{6(2)}{8}[/tex]Multiply:                       [tex]f"(x)=\frac{12}{8}[/tex]Simplify:                       [tex]f"(x)=\frac{3}{2}[/tex]

This means that the graph f(x) is concave up before [tex]x=\frac{-\sqrt{3}}{3}[/tex].

x = 0

Substitute:                    [tex]f"(x)=\frac{6(3(0)^2-1)}{(1+(0)^2)^3}[/tex]Exponents:                   [tex]f"(x)=\frac{6(3(0)-1)}{(1+0)^3}[/tex]Multiply:                       [tex]f"(x)=\frac{6(0-1)}{(1+0)^3}[/tex]Subtract/Add:              [tex]f"(x)=\frac{6(-1)}{(1)^3}[/tex]Exponents:                  [tex]f"(x)=\frac{6(-1)}{1}[/tex]Multiply:                       [tex]f"(x)=\frac{-6}{1}[/tex]Divide:                         [tex]f"(x)=-6[/tex]

This means that the graph f(x) is concave down between  and .

x = 1

Substitute:                    [tex]f"(x)=\frac{6(3(1)^2-1)}{(1+(1)^2)^3}[/tex]Exponents:                   [tex]f"(x)=\frac{6(3(1)-1)}{(1+1)^3}[/tex]Multiply:                       [tex]f"(x)=\frac{6(3-1)}{(1+1)^3}[/tex]Subtract/Add:              [tex]f"(x)=\frac{6(2)}{(2)^3}[/tex]Exponents:                  [tex]f"(x)=\frac{6(2)}{8}[/tex]Multiply:                       [tex]f"(x)=\frac{12}{8}[/tex]Simplify:                       [tex]f"(x)=\frac{3}{2}[/tex]

This means that the graph f(x) is concave up after [tex]x=\frac{\sqrt{3}}{3}[/tex].

Step 5: Identify

Since f"(x) changes concavity from positive to negative at [tex]x=\frac{-\sqrt{3}}{3}[/tex] and changes from negative to positive at [tex]x=\frac{\sqrt{3}}{3}[/tex], then we know that the P.P.I's [tex]x= \pm \frac{\sqrt{3}}{3}[/tex] are actually P.I's.

Let's find what actual point on f(x) when the concavity changes.

[tex]x=\frac{-\sqrt{3}}{3}[/tex]

Substitute in P.I into f(x):                    [tex]f(\frac{-\sqrt{3}}{3} )=\frac{3}{1+(\frac{-\sqrt{3} }{3} )^2}[/tex]Evaluate Exponents:                          [tex]f(\frac{-\sqrt{3}}{3} )=\frac{3}{1+\frac{1}{3} }[/tex]Add:                                                    [tex]f(\frac{-\sqrt{3}}{3} )=\frac{3}{\frac{4}{3} }[/tex]Divide:                                                [tex]f(\frac{-\sqrt{3}}{3} )=\frac{9}{4}[/tex]

[tex]x=\frac{\sqrt{3}}{3}[/tex]

Substitute in P.I into f(x):                    [tex]f(\frac{\sqrt{3}}{3} )=\frac{3}{1+(\frac{\sqrt{3} }{3} )^2}[/tex]Evaluate Exponents:                          [tex]f(\frac{\sqrt{3}}{3} )=\frac{3}{1+\frac{1}{3} }[/tex]Add:                                                    [tex]f(\frac{\sqrt{3}}{3} )=\frac{3}{\frac{4}{3} }[/tex]Divide:                                                [tex]f(\frac{\sqrt{3}}{3} )=\frac{9}{4}[/tex]

Step 6: Define Intervals

We know that before f(x) reaches [tex]x=\frac{-\sqrt{3}}{3}[/tex], the graph is concave up. We used the 2nd Derivative Test to confirm this.

We know that after f(x) passes [tex]x=\frac{\sqrt{3}}{3}[/tex], the graph is concave up. We used the 2nd Derivative Test to confirm this.

Concave Up Interval: [tex](- \infty,\frac{-\sqrt{3} }{3} )U(\frac{\sqrt{3} }{3} , \infty)[/tex]

We know that after f(x) passes [tex]x=\frac{-\sqrt{3}}{3}[/tex] , the graph is concave up until [tex]x=\frac{\sqrt{3}}{3}[/tex]. We used the 2nd Derivative Test to confirm this.

Concave Down Interval: [tex](\frac{-\sqrt{3} }{3}, \frac{\sqrt{3} }{3} )[/tex]

which branch of maths includes the most of other branches symbols/functions ect.​

Answers

Answer:

Algebra is a branch of mathematics dealing with symbols and the rules for manipulating those symbols. In elementary algebra, those symbols (today written as Latin and Greek letters) represent quantities without fixed values, known as variables.

Step-by-step explanation:

help pls :)))))))))))))))))

Answers

Triangle degree in total is 180
Which set if degrees = 180
Would be C. Because 30 + 60 + 90 would equal 180

Answer:

I think all measure can be used.

there are 3 arms for every 2 eyes. If there are 6 eyes, how many arms are there?

Answers

Answer:

There are 9 arms.

Step-by-step explanation:

7​% of ​$582 is how​ much?

Answers

Answer:

$541.26

Step-by-step explanation:

Please let me know if this helps

Plz mark B R A I N L I E S T

the answer is 40.74 actually

The tree in Lisa’s backyard is 7.4 m high. How high is it in centimeters?

Answers

Answer:

740 cm

Step-by-step explanation:

Answer: 740 centimeters

Step-by-step explanation:

All you have to do is multiply the length value by 100 giving you 740.

Which two statements describe how saving $200 every month in her traditional 401(k) retirement account is different from saving $200 every month for her car? Select all the correct answers. Isabel’s retirement savings are made with after-tax dollars. Isabel’s retirement savings are made with pretax dollars. Isabel’s retirement savings can be used for other purposes without penalty. Isabel’s retirement savings have more liquidity than the money in her savings account. Isabel’s retirement savings have no contribution limits. Isabel’s retirement savings may include a contribution from her employer.

Answers

Answer:

Isabel’s retirement savings are made with pretax dollars.

Isabel’s retirement savings may include a contribution from her employer.

Step-by-step explanation:

When you contribute to an IRA account, your contribution is tax deductible. This means that all the money that you contribute to your account comes from pretax dollars. This contribution is limited to $19,500 per year (for 2020) or $26,000 if you are 50 or older.

Your employer can also contribute to your 401(k) account and employer's contribution may be even higher than the employee's. Total contributions including employer's and employee's cannot exceed $57,000 per year (or $63,500 if 50 or older) or the employee's total compensation per year, whichever is lower.

The process for rationalizing a denominator in a variable expression is the same as in a numeric expression. Here’s a real-world example. The kinetic energy of the car of a rollercoaster is given by the formula k = one-half m v squared where k is kinetic energy, m is the mass of the car, and v is the velocity of the car. Solving this formula for v, we get v = StartRoot StartFraction 2 k Over m EndFraction EndRoot Which formula gives the velocity of the car in simplest form?

Answers

Answer:

It's B

Step-by-step explanation:

Got it right on EDGE2020

The value of velocity of the car will be v = √(2km) / m. Then the correct option is B.

What is kinetic energy?

If the object of mass m is moving with speed v. Then the kinetic energy of the object will be

KE = (1/2) mv²

The process for rationalizing a denominator in a variable expression is the same as in a numeric expression.

Here’s a real-world example.

The kinetic energy of the car of a rollercoaster is given by the formula

k = 1/2 m v²

Where k is kinetic energy, m is the mass of the car, and v is the velocity of the car.

Solving this formula for v, we get

[tex]\rm v = \sqrt{\dfrac{2k}{m}}[/tex]

Simplify the equation, we have

[tex]\rm v = \sqrt{\dfrac{2km}{m^2}}\\\rm v = \dfrac{\sqrt{2km}}{m}[/tex]

Then the correct option is B.

The complete question is attached below.

More about the kinetic energy link is given below.

https://brainly.com/question/12669551

#SPJ2

What fraction is equivalent to .9?

Answers

Answer:

9/100

Step-by-step explanation:

00.9=9/100

9%

000000

000000

000

Find the value of the variable, x



Group of answer choices

6

3

15

5

Answers

Answer:

I think you might have a mistake for the numbers you put there.

But the answer is about 15

Step-by-step explanation:

I did the calculation and got 14, but 15 is the closeest answer

Bryce had a $25 gift card to use on songs and games at an online media store. Songs cost $2 each and games cost $5 each. Bryce spent all the money on the gift card to download 8 items. Solve the system to determine how many games he purchased. Let s represent the number of songs and g represent the number of games. s + g = 8 2s + 5g = 25 Bryce purchased games.

Answers

Answer:

Bryce purchased 3 games.

Step-by-step explanation:

To find the number of songs and games that Bryce downloaded, we need to solve the following system of equations:

s + g = 8

2s + 5g = 25

We know that:

s + g = 8 → 2s + 2g = 16 → 2s = 16 -2g

2s + 5g = 25 → 16 - 2g + 5g = 25

→3g = 25 - 16

→3g = 9

→ g = 3

Therefore, bryce downloaded 3 games and 5 songs!

Answer:

.

3x + 2y = 16,

Step-by-step explanation:

On Sunday, 69% of the tickets sold at a theme park were children tickets, the rest were adult tickets. If the theme park sold 260 tickets in all, about how many children tickets were sold on this particular day?

Answers

Answer:

182

Oh and btw, its funny because I'm in your 6th period class. And i was looking up the answer and couldn't find it so when i found your i decided to help you answer it too

-Mikey

Answer:182

Step-by-step explanation:

how tall is bill gates?

Answers

Answer:

Bill Gates is 5'10"                                                                                                                      

plz i have no clue and this is due in 15 mins

Answers

Answer:

y = [tex]\frac{1}{2}[/tex] x  

Step-by-step explanation:

Slope of perpendicular to y = - 2x - 5 line is [tex]\frac{1}{2}[/tex]

y - 2 = [tex]\frac{1}{2}[/tex] ( x - 4)

y = [tex]\frac{1}{2}[/tex] x

Answer:

[tex]y=\frac{1}{2} x[/tex]

Step-by-step explanation:

What is 19,998 divided by 1,000,000,000,000,000,000,000,000,000,000,000

Answers

Answer:

1.9998e-29

Step-by-step explanation:

Every quadrilateral is a rhombus true or false

Answers

Answer:

false

Step-by-step explanation:

Answer:

false

Step-by-step explanation:

.    。    •   ゚  。   .

   .      .     。   。 .  

.   。      ඞ 。 .    •     •

  ゚   Josie was not An Impostor.  。 .

  '    1 Impostor remains     。

  ゚   .   . ,    .  .

10 1/8 - 3 5/6=.......?

Answers

Answer:

6 7/24

Step-by-step explanation:

6 7/24 Hope this helps!

A game room has a perimeter of 70 ft. The length is 5 more than twice the width. How many feet squared of new carpeting should be ordered?

Answers

Answer:

A = 250 square ft

Step-by-step explanation:

Equations

Let's call:

x = width of the game room

The length is 5 more than twice the width, thus:

2x+5 = length of the game room

The perimeter of a rectangle is twice the sum of the width and the length:

P = 2( x + 2x + 5 )

And the perimeter is 70 ft:

2( x + 2x + 5 ) = 70

Operating:

2( 3x + 5 ) = 70

Dividing by 2:

3x + 5 = 35

Subtracting 5:

3x = 30

Dividing by 3:

x = 30 / 3

x = 10

The width is 10 ft and the length is 2(10)+5=25 ft

The area of the game room is:

A = 10 ft * 25 ft

A = 250 square ft

Just for you :) happy thanksgiving

Answers

Answer:

thksss and happy thanksgiving to you 2

Step-by-step explanation:

Juan is 1 1/4 feet shorter than maria.maria is 1/3 foot taller than Luis. if Luis is 62 inches tall, how tall are maria and Juan.

Answers

Answer:

Maria is 58 inches tall and Juan is 42 inches

Step-by-step explanation:

Pls help me in these questions i will mark u brainliest.

Answers

Answer:

each angle is 83

Step-by-step explanation:

166÷ 2 = 83

check

83+83=166

hope it helps!!

Answer:

sum of two vertically angle =166°

X=166°/2 = 83°.

hence, each angle is equal to 83°.

X=

using this input output machine f(x)=?

input. output

2. 9
3. 15
5. 33
7. 59


x^2+x+3

x^2-x+3

x^2+x-3

x*2-5

Answers

Answer: 1 1/5 mph

Step-by-step explanation:

3. A $5,000 principal is invested in two accounts, one earning 1% interest and another earning 6%
interest. If the total interest for the year is $170, then how much is invested in each account?

Answers

Let, amount invested in first account is x.

So, amount invested in second account is ( 5000 - x ).

Now,

Total interest = Interest from 1  + Interest from 2

170 = x × 0.01 × 1 + ( 5000 - x ) × 0.06 × 1

17000 = x + 6( 5000 - x )

17000 = x + 30000 - 6x

5x = 30000 - 17000

x = $2600

Therefore, money invested in first and second account is $2600 and $2400.

Hence, this is the required solution.

pls answer no is answering mine


Noel works as a driver for a transportation company. On average, he drives 152 hours to make 19 successful deliveries. Assume this rate is his constant rate for delivering goods. If you graph this relationship with time along the x-axis and number of deliveries along the y-axis, the slope of the line you get gives Noel's unit rate for a successful delivery. Which unit rate can be interpreted as the slope?

a: 8 deliveries per hour
b :2/17 of an hour per delivery
c: 1/8 of a delivery per hour
d: 1/8 of an hour per delivery

Answers

Answer:

A

Step-by-step explanation:

By doing the unit rate, dividing 19 on both the top and bottom, getting this 8.36.../1, you can just round it to 8/1, meaning he makes about 8 deliveries per hour. Hope this helps!

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