Mia and holly can clean their room in 20 minutes, working together. Working alone, mia can clean the room in 30. How long would it take holly to clean alone?

Answers

Answer 1

Answer:  Holly would take 60 minutes to clean alone.

Step-by-step explanation:

Let t = Time taken by Holly to clean alone.

Given: Time taken by Mia to clean alone = 30 minutes

Time taken by Mia and holly to clean their room = 20 minutes

Then,

[tex]\dfrac1t+\dfrac{1}{30}=\dfrac{1}{20}\\\\\Rightarrow\ \dfrac{1}{t}=\dfrac{1}{20}-\dfrac{1}{30}\\\\\Rightarrow\ \dfrac{1}{t}=\dfrac{3-2}{60}\\\\\Rightarrow\ \dfrac{1}{t}=\dfrac{1}{60}\\\\\Rightarrow\ t= 60[/tex]

Hence, Holly would take 60 minutes to clean alone.


Related Questions

estimate the value of
[tex] \frac{ \sqrt{2\pi} }{ \sqrt{5} } [/tex]

Answers

After divide it, it would be 1.12 in decimal form

graph the equation with a y intercept of 2 and a slope of 2/3

Answers

Answer:y=2/3x+2

Step-by-step explanation:

Answer:

Step-by-step explanation:

go on the y-axis and go up to two and then go to the x-axis and start at zero and go to the left two and up three.

Can someone please explain how to do this

Answers

Answer: 82

Step-by-step explanation:

2 x 5 = 10

12 x 6 = 72

72 + 10 =82      

                                 tell me if u get it right

;)

HELP ME ASAP PLEASE?!!
(look at the image)
How is the graph of
f(x) = -3x2 – 4 different from the graph of f(x) = -3x2

Answers

Answer:

Both have the same line of symmetry but different turning points

But I maintain that if you had taken a shot of the entire question I would be of much help

Step-by-step explanation:

f(x)=-3x²-4

dy/dx=-6x

-6x=0

x=0

The line of symmetry of this parabola occurs at x=0

The minimum value of the curve is

f(0)=-3(0)²-4=-4

For f(x)=-3x²

dy/dx=-6x²

-6x²=0

x=0

The line of symmetry occurs at x=0

The maximum value=-3(0)²=0

if John has test scores of 90 and 76 with one test remaining to be taken, what score must he make on the last test to end up with an 86 average?

Answers

Answer: The last score must be 92%

Step-by-step explanation: To find the average, you add all the terms, then divide by the number of terms.

86 = [tex]\frac{90 + 76 + x}{3}[/tex]258 = 90 + 76 + x (multiple both sides by 3)258 = 166 + x (combine like terms)92 = x (subtract 166 from both sides)

Why would the end point for the function be (0,0)

Answers

Answer:

Yes, you are correct. It is (0,0)

Step-by-step explanation:

The lower left side of the curve hits the axis at 0,0 so you are correct. Try it

S = 365√x

Let x = 0

The square root of x when x = 0 is 0.

So S = 365√0

S = 0

Solve for brainlist ❤️❤️

Answers

Answer:

(68/4) multiply by 3601

Step-by-step explanation:

Which of the following is a composite number? Select the best answer from the choices provided. A. 47 B. 71 C. 89 D. 93 IT ONLY LETS YOU CHOOSE ONE

Answers

Answer:

93

Step-by-step explanation:

A composite number is a positive integer that has at least one divisor other than 1 and itself. Basically, the opposite of a prime number.

47, 71 and 89 are all prime numbers. The only composite number is 93.

Answer:

D: 93

Im not 100% sure but i think its right.

Last week Rachel power watch 2 3/5 miles per day on each of the seven days during the same week she also jobbed 5 3/4 miles per day on 4 days what was the total amount of Miles Rachel power walk and Jog last week

Answers

Answer:

41.2 miles

Step-by-step explanation:

The computation of the total amount of miles rachel walk and jog last week is as follows;

Unit rate per day is

= 2 3 ÷ 5

= 13 ÷  5

= 2.6 miles

In 7 days, she walked

= 2.6 miles × 7 days

= 18.2 miles

Now for four days, the unit per day is

= 5 3 ÷ 4 × 4

= 23 ÷ 4 × 4

= 23 miles

So, the total amount of miles would be

= 18.2 miles + 23 miles

= 41.2 miles

could somebody help me please

Answers

Answer:

1. -1

2.C

Step-by-step explanation:

Answer:

-1

c

Step-by-step explanation:

Last year, Nick went bowling several times and earned an average score
of 82 points. This year, after taking a class at school, he improved his score
to an average of 123 points. What is the percent of increase in Nick's
average score? *

Answers

Answer: 150%


Explanation:

1. Turn it into a fraction. (123/82)

2. Divide the numerator (123) by the denominator (82). (123÷82=1.5)

3. Multiply the decimal (1.5) by 100 and add “%” at the end to make it a percentage. (1.5x100=150)(150=150%)

I’ll give the Brainliest to who answers these questions with reasonable explanations.


1. A car stereo is on sale for $250 from its original $273 cost. What is the percent of the discount?

A. 84%

B. 92%

C. 9.2%

D. 8.4%
————————————————————————————————————————————————————————

2. The Universal Sports Company purchases weight racks directly from the manufacturer for $46 each. The weight racks are marked up 210% of the wholesale cost and sold. What is the amount of mark-up of each weight rack?

A. $1012

B. $966

C. $96.60

D. $142.60
————————————————————————————————————————————————————————

3. A television set that has an original price of $325.50 is on sale for 30% off. What is the selling price of the television?

A. $423.15

B. $97.65

C. $325.50

D. $227.85
————————————————————————————————————————————————————————

4. The Haas Door Co. produces truck dock door seals. Their 9' × 10' seal costs $280 to produce. The mark-up rate is 75% of the cost to produce. What is the retail price?

A. $280

B. $490

C. $770

D. $210





Thanks for the help!

Answers

Answer:

[tex]\mathrm{1.\:D.\:8.4\%}\\\mathrm{2.\:C.\: \$96.60}\\\mathrm{3.\:D.\: \$227.85}\\\mathrm{4.\:B.\:\$490}[/tex]

Step-by-step explanation:

1. The car's initial price was $273. Since the sale price is $250, the car is on a [tex]273-250=\$23[/tex] discount. The percent of discount is the discount price over the initial price:

[tex]\frac{23}{273}\approx \fbox{$8.4\%$}[/tex].

2. Since the weight racks were initially priced $46, then marked up 210%, their mark-up is:

[tex]46\cdot2.1=\fbox{$\$96.60$}[/tex]

*Worth noting that this is the mark-up (as the question is asking), not the total price after the mark-up.

3. The TV's initial price is $325.50. If it's on sale for 30%, it's final price will be [tex]100\%-30\%=70\%[/tex] of the initial price:

[tex]\$325.50\cdot 0.7=\fbox{$\$227.85$}[/tex]

4. The final retail price will be the initial price + the mark-up:

[tex]280+280(0.75)=\fbox{$\$490$}[/tex].

1 Answer: D(8.4%)
Explanation: 250 is 91.5 percent of 273. Minus 91.5 it is almost perfectly 8.4

2 Answer: C(96.60$)
Explanation: 250% of 46 is 96.60 I put it in a percentage calculator and you can do this with almost every problem

3 Answer: D(227.85$)
Ex: 30% of 325.50 is 97.65 and just minus that from 325.50 and you get 227.85$

4 Answer: D(210$)
Ex: 75% of 280 is 210

Thelma and Louise ordered take-out from Belle Taco. Thelma ordered 2 tacos and 1 quesadilla and paid $5.51. Louise ordered 2 quesadillas and 1 taco and paid $7.09.

Answers

Answer:

The cost of 1 taco is $1.31 and 1 quesadilla is $2.89

Step-by-step explanation:

Let [tex]x[/tex] be the cost of 1 tacos and [tex]y[/tex] be the cost of 1 quesadilla

Thelma's order

[tex]2x+1y=5.51\quad\ldots(i)[/tex]

Louise's order

[tex]1x+2y=7.09\quad\ldots(ii)[/tex]

Performing the operation [tex]2\times (i)-(ii)[/tex] we get

[tex]4x+2y=11.2[/tex]

[tex]x+2y=7.09[/tex]

[tex]3x=3.93\\\Rightarrow x=\dfrac{3.93}{3}\\\Rightarrow x=1.31[/tex]

[tex]2x+y=5.51\\\Rightarrow 2\times 1.31+y=5.51\\\Rightarrow y=5.51-(2\times 1.31)\\\Rightarrow y=2.89[/tex]

The required answer is

The cost of 1 taco is $1.31 and 1 quesadilla is $2.89.

On Wednesday, Larry ran 3 miles at 7 mph. How long did it take him to run the 3 miles?

Answers

7 miles in one hour
1 mile in 8 and 4/7 mins
3 miles in 25.7 mins (1 dp)

Charles packs 25 boxes in 5 hours. How many boxes can he pack in his 25-hour shift?

Answers

Answer:

he can pack 30 boxes

Step-by-step explanation:

i hope this helps

125 is the Answer because 25x5 is 125 hope this helps

Can you help me!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

1,610 is the answer

Kinda confused. Will give 20pts.

Answers

Answer:

Step-by-step explanation:

the ratio between similar triangles are constant.

so 11/14 has to be equal to z/8 and also a15 = 11/14

so from this we can conclude that z = 8*14/11 = 10.18

Answer:

z = 11 and a = 12

Step-by-step explanation:

These two triangles are similar, in this case, the same angles but different sizes. The answer to this problem is the length of the sides of the triangles. You are given the right side's length on both triangles. The first triangle's sides are 3 (inches, cm, whatever form of measurement is being used) bigger than the second triangle's. Using this information, you can figure out the quantity of both a and z.

Hope this helps.

Please help!! 20 points!!! I don’t know if is d....

Answers

Yes it is D. I hope this helps

ILL GIVE YOU BRAINLIST PLS HELP THE PICTURE IS BELOW.

Answers

Answer:

(32,48)

Step-by-step explanation:

Notice the pattern? Every time the number multiplies by 2.

need help please answer !!!

Answers

I feel like it might be the second one

‘Saturn' chocolate bars are packed either in boxes of 5 or boxes of 12. What is the smallest number of full boxes required to pack exactly 2005 ‘Saturn' bars?

Answers

Answer:

167

Step-by-step explanation:

Given that :

Saturn chocolate bars are either packed in 5's or 12's

The smallest number of boxes required to pack 2005 bars ;

In other to arrive at smallest number of boxes, then we need to pack primarily in 12's

Number of boxes required for 12 packing :

2005 /12 = 167.08333 boxes (167, remainder 1)

Hence, smallest number of boxes to pack 2005 saturn chocolate bars is 167

Select all the Intervals where f is increasing
A) -3 B) -1 C) 3.5 D) None of the above

Answers

Answer:

-3<x<-2

And

3.5<x<4.5

Step-by-step explanation:

Need answer fast as possible

Answers

Answer:15

Step-by-step explanation:

The box on the left is square in a square all side are equal

Answer:

15

Step-by-step explanation:

That's a square, so all lengths are the same

You buy 11 bagels with a $20 bill. How much change do you receive?

Answers

can’t answer the question without knowing the price of the bagels

well 6 bagels cost $7.50  and you bought 11 bagel with a $20 dollar bill

so answer that

I NEED HELP PLEASE !!!!

Answers

Answer:

Circle

Step-by-step explanation:

n/a

A ship captain is mapping a trip and wants to know the distance the ship will travel over certain time intervals.



Assuming that the ship travels at a constant speed, what is its speed? Show your thinking.

Answers

constant speed
——————————————————

non-constant speed
———_____——^——____——

Help. what would the second question be ?

Answers

Answer:

The box is worth 32.30$ ( approximately) in 2021

Step-by-step explanation:

please help
Stay safe and healthy

Answers

Answer:

9 No explanation needed

Graph the line with the equation y = -3x – 2.
10
9
-10-9
-6 -5
-4
-3
1
3
4
5 6 7 8 9 10

Answers

Answer:

First start with the y-intercept at -2.

Then graph it three units to the right, then one unit down.

Step-by-step explanation:

Please mark as Brainliest!

Answer:

Place a point on (-6,0) and (0,-2) then draw a line that goes through both of those two points. You will then have graphed that equation.

I hope this helps!

Ummm help plz and thank you

Answers

Answer: Last one

Step-by-step explanation:

(1/3)^3=1/27ft

(1/27)*30= 1 1/9ft

Its the last one

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