PLZZZ HELPPP
Kim and Josh can clean a house together in 3 hours. If it takes Kim 7 hours to clean the house by herself, how long would it take Josh to clean the house alone? Leave your answer in improper fraction form, then convert to a decimal.

Answers

Answer 1

Answer: 28/3 hours

Step-by-step explanation:

From the question, Kim and Josh can clean a house together in 3 hours while Kim alone uses 7 hours to clean the house by herself.

Kim's hourly rate will be to clean the house = 1/7 per hour.

In 4 hours:

Kim will have completed = 1/7 × 4 = 4/7 of the house

This mean that Josh completes:

1 - 4/7 = 3/7 of the house.

Josh's hourly rate will now be:

1/4 × 3/7 = 3/28 of the house per hour.

From Josh to clean the house alone, he will use:

= 1 ÷ (3/28)

= 1 × 28/3

= 28/3 hours

Josh will use 28/3 hours to clean the house alone?


Related Questions

someone please help me, I’m struggling :(

Answers

Answer:

constant because it isn't going up or down, just moving straight

Step-by-step explanation:

Answer:

constant

Step-by-step explanation:

Since this is a horizontal line the slope is zero

This means the graph is constant

(1) a) 5270 cl= ? dal

b) 5,3 kl= ? hl

c) 58000 ml= ? dal

d) 0,39 dal = ? l

e) 7,8 dal = ? dl

f) 57,2ml= ? cl

(2)

a) 3,7 l= ? cm3

b)29,6 dm3 = ? cl

c)8,1 l = ? cm3

d) 5 l= ? m3

e) 5,2 cl = ? mm3

f) 375 ml = ? cm3

g) 1300cm3 = ? dl

h) 8,6 ml = ? mm3

i) 51,8 × 10 la puterea a 11 a litri= ? Km3

Answers

Answer:

Check below

Step-by-step explanation:

1) These metric volume units can be easily converted by dividing or multiplying by 10 and its multiple. Like this: each step up on the ladder multiply by 10. Each step down divide by 10

[tex]a)5270 \:cl=527\:dl\\b)kl=5.3 \times 10=530 hl\\c)58000ml=5.8 dal =(\frac{58000}{10000})\\d)0.39 dal=3.9 l\\e)7.8 dal=780 dl\\f)57.2 ml=5.72 cl[/tex].

2) When it comes to area, the "ladder scheme" remains valid but now we'll multiply or divide by

[tex]10^3[/tex]

Bear in mind these useful relations:

[tex]1litre =\frac{1}{10^3}m^{3}[/tex]

[tex]1 cm^{3} =1 ml[/tex]

[tex]a) 3.7 l=3700 cm^{3}\\b)29.6 dm^{3}\\29.6 dm^{3} \rightarrow 29.6\times10^{3} cm^3=29.6\times10^{3} ml = 29.6\times10^{2} cl \:or\:2960 cl\\c)8.1l=8100 cm^{3}\\d)5l=\frac{5}{10^{-3}} m^{3}\\e)5.2 cl=52ml=52 cm^{3}=52\times10^{3}=52000 \:mm^{3}\\f)375 ml=375 cm^{3}\\g) 1300 cm^{3}=1300 ml=13 dl\\h) 8.6 ml= 8.6 cm^{3}\times\: 10^{3}=8600 mm^{3}\\i) 51.8\times 10^{11} l \rightarrow 51.8\times 10^{-11}km^{3}[/tex]

solve the question 2 (3x plus 5) Square - 16 = 0 buy completing the square​

Answers

Answer:

Step-by-step explanation:

If today is not Thursday then tomorrow is not Wednesday

Answers

Answer:

Not sure what your choices are but.. assuming its finding these,

Inverse: If tomorrow is not Wednesday, then today is not Thursday.

Contrapositive: If Today is not Thursday, then tomorrow is not Wednesday.

Converse: If tomorrow is Wednesday, then today is Thursday. 

Step-by-step explanation:

expand and simplify the equation

Answers

Answer:

7x+12

Step-by-step explanation:

5(3x+2) - 2(4x-1)

Distribute

15x + 10 -8x+2

Combine like terms

7x +12

7x+12
.....
.....
....
....

Help me out with this question

Answers

Hi! I'm here to help. So what you're gonna wanna do is do 6 divided by 2.

6 / 2 = 3

Have a good day/night!

Answer:

[tex]2/6=1/3[/tex]

what is the area of the circle ​

Answers

Answer:

A = 51.84π

Step-by-step explanation:

Area of circle = [tex]\pi r^2[/tex]

r = 7.2

A = 51.84π

15 / 80
a) Work out 4 1/7 + 1 1/2

Answers

Answer:

5 9/14

Step-by-step explanation:

4 1/7 + 1 1/2= 5+1/7+1/2= 5+ 2/14+7/14= 5+ 9/14= 5 9/14

first put them into improper fractions, makes it easier

29/7 + 3/2

make the denominator the same

58/14 + 21/14 = 79/14

put it into a mixed fraction

79/14 = 5 9/14

Find the slope of the line that passes through (1, 2) and (10, 9).

Simplify your answer and write it as a proper fraction, improper fraction, or integer.

Answers

Answer:

7/9

Step-by-step explanation:

(2 +76÷1+9)+4-3x7 equal?​

Answers

your equation equals 70

Step By Step:

(2 +76÷1+9)+4-3x7

(2+76+9)+4-3x7

87+4-21

70

What is the largest possible value
could take given that it must be an integer?
x<5

Answers

An integer is a whole number, so 4 is the answer. This is because it is only less than, not less than or equal too.

Let f(x) = ............

Answers

Answer:

So first lets find g(-1)

so we plug in the answers:

-2 * -1 ^2 -4

-2*1-4 = -2-4 =

-6

Now lets solve for f(-2)

-2^2-3

4-3=1

-6+1 = 5

3*5 = 15

Im getting answer of 15 but it shows -15 or something, so I dont know if I got it wrong or if its like a dash then the answer.

PLEASE HELP!!!the pattern follows the rule, starting with a value of 4, every consecutive row has a value that is 2 less than twice the value of the previous row. What is the value of the fifth row

Answers

Answer:

34

Step-by-step explanation

1- 4

2- 4(2) - 2 = 6

3- 6(2) - 2 = 10

4- 10(2) - 2 = 18

5- 18(2) -2 = 34

Please answer correctly !!!!! Will mark brainliest answer !!!!!!!!!!

Answers

Answer:

same

Step-by-step explanation:

The maximum of f(x) is 8 because it's written in vertex notation. From the graph, g(x)'s maximum is 8 so the answer is that they have the same maximum.

x^4-8x^2-33-14y-y^2​

Answers

Answer:

I'm glad you asked!

Step-by-step explanation:

So let's simplify the number which is all you can do .

[tex]x^{4} -8x^{2} -33-14y-y^{2}[/tex]

= [tex]x^{4} +-8x^{2} +-33+-14y+-y^{2}[/tex]

Answer:

=[tex]x^{4} -8x^{2} -y^{2} -14y+-y^{2}[/tex]

The chart below shows the prices at different stores for bags of chips. ​ Store A has 2 for $4 Store B has 3 for $5 Store C has 5 for 8$ and Store D has $1.25 each ​At what store will it be the least expensive to buy 30 bags of chips?

Answers

The answer to you question is D

inductive reasoning is when uses lots of data to make a conjecture A. True B. False please answer now I need help with this please answer

Answers

Answer:

False

Step-by-step explanation:

Inductive reasoning is a method of reasoning in which the premises are viewed as supplying some evidence for the truth of the conclusion.

There are 24 students in Julie’s class. 6 of these students are boys. What percent of the class are boys

Answers

Answer:

25%

Step-by-step explanation:

Take the number of boys over the total

6/24

1/4

Change to a decimal

.25

Change to a percent

25%

Simplify problem: ∛-27n^27

Answers

Answer:

-3n⁹

Step-by-step explanation:

= [tex]\sqrt[3]{-27n^(27)}[/tex]

= [tex]\sqrt[3]{-27} * \sqrt[3]{n^{27}}[/tex]

= (-3) × n⁹

= -3n⁹

10 ft
8 ft
8.9 ft
4 ft
Calculate the perimeter of this figure
to the nearest 10th

Answers

Answer:

40.9 ft.

Step-by-step explanation:

We know all the side lengths needed:

8 + (10*2) + 8.9 +4 = 40.9

So then you just add them!

PLEASE HELP I need the answer for this ASAP pleaseeeee

Answers

Answer:

13

Step-by-step explanation:

[tex]f(x) = 5 \sqrt{x} + 8 \\ f(1) = 5 \sqrt{1} + 8 \\13[/tex]

Hope this helps..

if 60% of a number is 90, what is 4/5 of the number

Answers

Answer:

120

Step-by-step explanation:

To solve this, we can first find the value of the number.

Let's name the number x.

We can set up a proportion to solve.

90/60=x/100

Simplify.

9/6=x/100

Cross multiply.

6x=900

Divide both sides by 6.

x=150

The original number is 150.

Let's find 4/5 of that.

4/5*150

Multiply.

600/5

Divide.

120

________________________________

Hey!!!

Solution,

Let the number be X

60% of X=90

or,60/100*X=90

or,3/5*X=90

or,X=90/3/5

or,X=90*5/3

or,X=450/3

X=150

Again,

4/5 of X

=4/5*150

=120

The answer is 120

hope it helps

Good luck on your assignment

_____________________________

What is the value of y?

Answers

I’m pretty sure it’s D.........

Which formulas can you use to calculate the volume of a rectangular prism check all that apply

Answers

Answer:

V = Bh

Step-by-step explanation:

Answer:

v=lwh

v=bh

Step-by-step explanation:

edge2020

Given that 3x/8 = 9y/4, Find the ratio of x:y​

Answers

Answer:

1:6

Step-by-step explanation:

3x/8 = 9y/4

Multiply by 8

3x = 9y/4 *8

3x = 18 y

Divide by 3

x = 18y/3

x = 6y

The ratio is of x to y is

1:6

Answer:

Step-by-step explanation:

3x/8=9y/4

3x/2=9y

1.5x=9y

1.5x:9y

doughnuts are sold in bags and cartons.
A bag holds 4 doughnuts and a carton holds 10 doughnuts.
he buys a total of T doughnuts.
Write down a formula for T in terms of B and c

Answers

Answer:

T=(b+4)+(c+10)

Sorry but I really don’t know but I tried

What happens when you see 42 (17 – 15) / (3 + 1) – 5 ? What do you do first? The mnemonic PEMDAS or Please Excuse My Dear Aunt Sally can help you remember the order of operations: Parentheses, Exponents, Multiplication/Division, Addition/Subtraction. If your expression doesn't have every type of operation, the order of operations is still the same. If it is missing one, just skip it and move on to the next operation. Which operation is done first to evaluate this expression: 5 + 7 x 2 - 9

Answers

Answer:

The operations done first are:

a)  42 (17 – 15) / (3 + 1) – 5 ; (17 -15) or (3 + 1) (parenthesis) are done first

b)  42 (17 – 15) / (3 + 1) – 5 ; 7 × 2 (multiplication) is done first

Step-by-step explanation:

from the mnemonic PEDMAS, the order of operations are: Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.

hence in the first expression : 42 (17 – 15) / (3 + 1) – 5, the parenthesis (bracket is simplified first as follows:

(17 - 15) = (2) ;  and (3 + 1) = (4) ;  hence the expression will be simplified as follows: 42 (2) / (4) - 5.

Next, since there is no exponent in the expression, Multiplication follows:

42 (2) = 42 × 2 = 84 ; hence he expression becomes: 84 / 4 - 5

Next division follows : 84/4 = 21, therefore the expression becomes

21 - 5.

Finally, subtraction follows : 21 - 5 = 16

b)  5 + 7 x 2 - 9;

first, multiplication is done: 7 × 2 = 14, hence the expression becomes :

5 + 14 - 9.

Next in the order is addition : 5 + 14 = 19, hence, the expression becomes:

19 - 9.

Finally, subtraction follows: 19 - 9 = 10

Answer:

multiply

Step-by-step explanation:

the graph below describes the journey of a train between two cities

Answers

Answer:

Step-by-step explanation:

To find : Acceleration in first 15 min . Distance between two cities  Average speed of journey

Solution:

Each horizontal block is 1/8 hr = 7.5 min

Each vertical block is 10 km/hr

Time                    Velocity  km/hr

0 Min  ( 0 hr)            0

15 Min (1/4 hr)           50

45 Min (3/4 hr)         50

60 MIn  ( 1 hr)            100

90 Min  ( 3/2 hr)        100

120 Min ( 2hr)            0

Acceleration in first 15 min  (1/4 hr)  =  (50 - 0)/(1/4 - 0)  = 50/(1/4)

= 200  km/h²

Distance between two cities

= (1/2)(0 + 50)(1/4 - 0)  + 50 * (3/4 - 1/4)  + (1/2)(50 + 100)(1 - 3/4)  + 100 * (3/2 - 1) + (1/2)(100 + 0)(2 - 3/2)

=  25/4  + 25 + 75/4   + 50 + 25

= 125

Distance between two cities = 125 km

Average Speed of journey = 125/2  = 62.5  km/hr

Acceleration in first 15 min = 200  km/h²

Distance between two cities = 125 km

Average Speed of journey =  62.5  km/hr

Hope this helps..

Answer:

200km/h^2, 125km, 62.5km/h

Step-by-step explanation:

For part a) just use the acceleration formula (change in velocity/time). For part b), remember that distance traveled is the area under the graph. This is because displacement is the integral of velocity, meaning that you integrate to find the area (i.e. displacement). Lastly, for part c), just apply speed = distance/time because in this case, acceleration is constant.



PLEASE I NEED IT ASAP (5 MIN) 24 POINTSSS


A 2-column table with 4 rows. Column 1 is labeled Bag Size with entries 2 pound, 6 pound, 8 pound, 12 pound. Column 2 is labeled Price with entries 4 dollars and 50 cents, 12 dollars and 30 cents, 16 dollars and 80 cents, 25 dollars and 20 cents. Darryl needs 84 pounds of coffee for his deli. Use the prices for the different-size bags shown in the table to identify which size bag he should buy, the number of bags he will need, and the total price for that number of bags. Which size bag should Darryl buy? How many of those bags will he need? What will be the total cost of the coffee?

Answers

Answer:

6 pound - first one

14 - second one

$172.20 - third one

Answer:

94.88

Step-by-step explanation:

this is the right answer


Factor the trinomial by grouping.
- 13x + 6 + 6x^2

Answers

Answer:

(2x-3)(3x-2)

Step-by-step explanation:

[tex]-13x+6+6x^2= \\\\6x^2-13x+6= \\\\6x^2-4x-9x+6= \\\\2x(3x-2)-3(3x-2)= \\\\(2x-3)(3x-2)[/tex]

Hope this helps!

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