1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nasty-shy [4]
3 years ago
9

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?
Mathematics
1 answer:
Oduvanchick [21]3 years ago
5 0
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.
You might be interested in
11. Let f(x) = 2x² + 7x + 5
Lady_Fox [76]

Answer:

(x+1)(2x+5)

Step-by-step explanation:

f(x) = 2x² + 7x + 5

Factor the expression by grouping. First, the expression needs to be rewritten as 2x²+ax+bx+5. To find a and b, set up a system to be solved.

a+b=7

ab=2×5=10

Since ab is positive, a and b have the same sign. Since a+b is positive, a and b are both positive. List all such integer pairs that give product 10.

1,10

2,5

Calculate the sum for each pair.

1+10=11

2+5=7

The solution is the pair that gives sum 7.

a=2

b=5

2x²+7x+5 as (2x²+2x)+(5x+5).

(2x²+2x)+(5x+5)

Factor out 2x in the first and 5 in the second group.

2x(x+1)+5(x+1)

Factor out common term x+1 by using distributive property.

(x+1)(2x+5)

7 0
3 years ago
Does anyone know the answer to this?
Savatey [412]

Answer:

numbers of tables on the y axis and the money earned on the x axis

Step-by-step explanation:

8 0
3 years ago
Solve.
Eva8 [605]

2x^2+x-1=2\ \ \ |-2\\\\2x^2+x-3=0\\\\2x^2+3x-2x-3=0\\\\x(2x+3)-1(2x+3)=0\\\\(2x+3)(x-1)=0\iff 2x+3=0\ \vee\ x-1=0\\\\2x+3=0\ \ |-3\\2x=-3\ \ \ |:2\\x=-\frac{3}{2}\\\\x-1=0\ \ \ |+1\\x=1

Answer: C 1, -3/2

4 0
4 years ago
The sum of the first two terms of an infinite GP is 6 and each term is 5 times the sum of the succeeding termsthen the second te
kozerog [31]

Answer:

\dfrac{6}{7}.

Step-by-step explanation:

It is given that the sum of first two terms of an infinite GP is 6.

nth term of a GP is

a_n=ar^{n-1}

a+ar=6     ...(1)

Each term is 5 times the sum of the succeeding terms.

a_n=5(a_{n+1}+a_{n+2}+...+\infty)

ar^{n-1}=5(ar^n+ar^{n+1}+...+\infty)

ar^{n-1}=5ar^n(1+r+r^2+...+\infty)

Divide both sides by a.

r^{n-1}=5r^n(\dfrac{1}{1-r})    [\text{Sum of infinite GP}=\dfrac{a}{1-r}]

\dfrac{r^n}{r}=\dfrac{5r^n}{1-r}

\dfrac{1}{r}=\dfrac{5}{1-r}

1-r=5r

1=6r

\dfrac{1}{6}=r

The common ratio is 1/6.

Put r=1/6 in (1).

a+a(\dfrac{1}{6})=6

6a+a=36

7a=36

a=\dfrac{36}{7}

Second term ar=\dfrac{36}{7}\times \dfrac{1}{6}=\dfrac{6}{7}

Therefore, the second term is \dfrac{6}{7}.

4 0
3 years ago
Two tickets to the movies cost a total of $32. If a sales tax of 6% is added to the cost of the tickets, what is the FINAL PRICE
saul85 [17]

Answer: $33.92

Step-by-step explanation:

   We will find 106% of the tickets to answer this question.

   A percent divided by 100 becomes a decimal.

106% / 100 = 1.06

   We will multiply the price for the tickets by this decimal.

$32 * 1.06 = $33.92

     The final price for the tickets is $33.92.

7 0
2 years ago
Other questions:
  • Which of the following is equivalent to the equation below
    8·1 answer
  • Find the inverse of the function y= (x-4)3
    12·1 answer
  • find the magnitude of two forces f1 and f2 such that at right-angle to each other, their resultant is √13N. Also, if the two for
    14·1 answer
  • 1) 5.10-2.8.16. 10-1
    14·1 answer
  • PLEASE HURRY WILL GIVE BRAINLIEST A truck can be rented from Company A for $90 a day plus $0.30 per mile. Company B charges $70
    7·1 answer
  • At a discount furniture store, there is a sale price of $550 for a couch
    6·1 answer
  • 5692 in standard form
    10·2 answers
  • A chameleon is looking for prey. Let positive numbers represent the elevation of prey above the chameleon and negative numbers r
    15·1 answer
  • Name the x- and y- intercepts for equation 2x- y=6
    8·2 answers
  • X-9/2=-12 guys please help
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!