One cleaning crew can clean a school in 6 hours. A second crew can clean the school in 9
hours. How long will it take if both crews work together to clean the school?

Answers

Answer 1

It will take them 7.5 hrs

Answer 2

Answer:

7.5

Step-by-step explanation:

9 + 6 =15hrs

15hrs/2 people

7.5


Related Questions

If point A is reflected across both axes, what are the coordinates of the reflected point?

Answers

Answer:

The answer is "(6,3)".

Step-by-step explanation:

In this question, the point is missing if the given point is (-6,-3) so, its solution can be defined as follows:

Throughout this question whenever we reverse the axis to the mirror at the point. The reflection of (-6,-3) is (6,3), which also is the correct value because it changes the coordinates, that's why (6,3) is the correct point.


A. The triangles are congruent by ASA

B. The triangles are congruent by AAS

C. The triangles are congruent by SAS

D. The triangles are congruent by SSS.

E. The triangles are not congruent.

Answers

A. the triangles are congruent by ASA

9514 1404 393

Answer:

  B. The triangles are congruent by AAS

Step-by-step explanation:

Side WY is part of both triangles and congruent to itself. It is not between the two marked angles, and is opposite the same angle. The appropriate choice is ...

  B. The triangles are congruent by AAS

CAN SOMEONE HELPME I BEEN STUCK ON THIS FOR 3 HOURS​

Answers

Answer:

A,B,D

Step-by-step explanation:

Difference between an equation and an expression: equation has an equal sign while an expression does not. (C is also an inequality)

how can i write an equation with a line that passes through (-3,0) (-6,0)​

Answers

first of all we have to find the slope by this relation

y₂-y₁
———
x₂-x₁

0-0
———
-6 + 3

= 0

so the slope is 0

y-y₁ = m (x-x₁)

y-0 = 0 (x-0)

y = 0

• Exprimer l'aire A de la partie colorée de la figure ci-
dessous en fonction de x. Donner le résultat sous
forme simplifiée en écrivant les détails.
• Calculer A pour x = 3 et x = 2.

Answers

Answer:

10

Step-by-step explanation:

by dojng lenght into breadth

Find the surface area of the prism.

6.5 ft
6 ft
11 ft
2.5 ft
The surface area is
square feet

Answers

Answer:

180ft^2

Step-by-step explanation:

lw + lw + lw + bh

[ (11*2.5) + (6.5*11) + (6*11) <- Area of the rectangles ]

[ (6*2.5) <- Area of the Triangles ]

[ (11*2.5) + (6.5*11) + (6*11) ] = 165

[ 6*2.5 ] = 15

165 + 15 = 180

180ft^2

Find the distance between the points (9, 8) and (5, 3).

Write your answer as a whole number or a fully simplified radical expression. Do not round,

___ unit

Answers

Answer:

[tex]\sqrt{41}[/tex] units

Step-by-step explanation:

To find the distance between two points, we can use the Pythagorean theorem by creating a right-angled triangle where sides a and b are the distances between the y-coordinates and x-coordinates of each point.

First let's find the distance between the x-coordinates:

(9,8): x-coordinate is 9, and (5,3): x-coordinate is 5.

9 - 5 = 4

The first side of our triangle is 4 units.

y-coordinates:

8 - 3 = 5

The second side of our triangle is 5 units.

[tex]a^{2} +b^{2} =c^{2}[/tex]

[tex]4^{2} +5^{2} =c^{2} \\16 +25 =c^{2} \\41 = c^{2} \\\sqrt{41} =\sqrt{c^{2} } \\\sqrt{41} = c[/tex]

Squareroot 41 is fully simplified as 41 is a prime number.

I have attached a picture to help visualize the triangle.

Hope this helped!

shown is a regular pentagon, find y.

Answers

Answer:

54 degrees

Step-by-step explanation:

Every side of a regular pentagon is same.

So we have an  isosceles triangle. The  correspond angle of y, must equal to y (degree) too.

Also, every inner angle of a regular pentagon is 360/5=72. So we can calculate angle y, by the equation y+y+72=180.

y=54

A bag contains 45 dyed eggs: 15 yellow, 12 green, and 18 red. What is the probability of selecting a green or red egg.

Answers

Answer:

it's 30/45

Step-by-step explanation:

because there are 12 green and 18 red which equal 30. Then there are 45 eggs in total. So 30/45

Probability of selecting a green or red egg is equals to [tex]\frac{30}{45}[/tex].

What is probability?

" Probability is defined as ratio of number of favourable outcomes to the total number of outcomes."

Formula used

Probability [tex]= \frac{Number of favourable outcomes}{Total number of outcomes}[/tex]

According to the question,

Given,

Total number of dyed eggs [tex]= 45[/tex] dyed eggs

Number of yellow eggs [tex]= 15[/tex]

Number of green eggs [tex]= 12[/tex]

Number of red eggs [tex]= 18[/tex]

Substitute the value in the formula to get the probability of each required colour egg,

Probability of green egg [tex]P(G)= \frac{12}{45}[/tex]

Probability of red egg [tex]P(R)= \frac{18}{45}[/tex]

Both are independent therefore,

P( G ∩ R) [tex]=0[/tex]

Probability of selecting a green or red egg [tex]= P(G) + P(R)[/tex]

                                                                         [tex]= \frac{12}{45} + \frac{18}{45}\\\\= \frac{30}{45}[/tex]

Hence, probability of selecting a green or red egg is equals to [tex]\frac{30}{45}[/tex].

Learn more about probability here

brainly.com/question/11234923

#SPJ2

What is the greatest angle measure in the diagram?

95o
105o
119o
180o

Answers

Answer:

180

Step-by-step explanation:

I think so but not sure.

Answer:

119

Step-by-step explanation:

A road has a slope of 1/10. If a car goes from an elevation of 543 to 768 (rise), how far has the car gone horizontally (run)?

Answers

Answer:

Step-by-step explanation:

(768-543)/d=1/10

225/d=1/10

d=10(225)

d=2250

When doing decimals, what does a dot over a number mean? For example, take 24.671, but theres a small dot over the numbers 6 and 1. What do I do and what does it mean?

Answers

Step-by-step explanation:

The dot is called a decimal point. It is also called the decimal separator. It separates whole numbers from fractional numbers.

In this example;

24.671

The numbers before the point, 24 is the whole number

The numbers after the point, 671 are the fractional portion of the number. They represent 6 tenths, 7 hundredths and 1 thousandths.

Also, the number of digits after the point tells you how many decimal place the number is in. In this example the number of decimal places is 3.

Find the missing side length.
Assume that all intersecting sides meet at right angles.
Be sure to include the correct unit in your answer.


Help please Asap!!!

Answers

Answer:

4 cm, if you subtract 9 from 13 you get four.

Question 8 (4 points)
What is the area of the figure?
10 in
19 in
11 in.
17 in.
A. 223 in 2
B. 277 in 2
C. 267 in 2
D. 110 in 2

Answers

The area of the figure is A. 223 in 2 I did that question yesterday hahah what grade are you in?

What is the point-slope form of a line that has a slope of 3 and goes through the point (-2, 4)?

Answers

Answer:

y-4=3(x+2)

Step-by-step explanation:

Plug into point slope equation with slope m and point (x1,y1)

y-y1=m(x-x1)

y-4=3(x+2)

1. f(x) = x + 5, f(x) = 9

Answers

Answer:The answer is x =4

Step-by-step explanation:

NEED HELP ASAP FREE BRAINLIST

Answers

It would be A 50cm !

Answer:

yay free brainlest

Step-by-step explanation:

What is the 100th term of the sequence with a1 = 222 and d = -5?

1.-273
2.-278
3.717
4.722

Answers

Answer: the 100th term of the sequence =-273 (1)

Step-by-step explanation:

Since the first term = 222

and d  (common difference )=-5 Then we are talking about an arithmetic progression

The nth term of an Arithmetic progression is given as

Tn=a + (n - 1)d

Therefore given that n =100

Tn=a + (n - 1)d = 222 +(100-1)-5

222+ (99)-5

222-495=-273

Please could someone work this out

Answers

1. 448000 cm^3

2. 56 minutes

:D

a map has a scale of 1m represents 2 km. write this scale as a ratio in its simplest form

Answers

Answer:

Step-by-step explanation:

First, find yourself a map. Then, using two points, find both the distance on the map and the true distance. Next, you divide the true distance by the measured map distance, and find your scale. Last, you need to place that ratio onto your map.

1m / 2km = 1m / 2000m = 1 / 2000

tell me the answer this will find how good you are you in fraction​

Answers

Step-by-step explanation:

We need to solve the given fractions.

(1) [tex]18\times \dfrac{2}{12}=3[/tex]

(2)

[tex]2\dfrac{2}{3}\times 2\dfrac{1}{4}\\\\=\dfrac{8}{3}\times \dfrac{9}{4}\\\\=6[/tex]

(3) [tex]\dfrac{3}{5}\div 9[/tex]

We know that, [tex]\dfrac{x}{y}\div \dfrac{a}{b}=\dfrac{x}{y}\times \dfrac{b}{a}[/tex]

So,

[tex]\dfrac{3}{5}\div 9=\dfrac{3}{5}\times \dfrac{1}{9}\\\\=\dfrac{1}{15}[/tex]

Hence, this is the required solution.

find lkm pls will give branlist

Answers

Answer:

[tex]3x - 70 = 50 + x \\ 2x = 120 \\ x = 60[/tex]

so ..

X=60

and

3x-70=180-60=110

Step-by-step explanation:

According to the theorem of exterior Angle,Measure of Exterior angle=Sum of two OPPOSITE interior angles

Answer:

angle LKM = 110 degrees

Step-by-step explanation:

angle JKL = 180 - (3x-70) because they are supplementary angles

angle JKL + x + 50 = 180 degrees because the sum of all the interior angles of a triangle equals 180 degrees

substituting for angle JKL:

180 - (3x - 70) + x + 50 = 180

180 - 3x +70 + x + 50 = 180

simplify:

-2x = -120

x = 60 degrees

angle LKM = 3(60)-70 = 110 degrees

Please I need help !!!

Answers

Answer:

Step-by-step explanation:

4 and 6

What is the scale factor of the dilation?

Answers

Answer: A is multiplied by  2  B is multiplied by B and C is multiplied by 2

Step-by-step explanation:

A
B
C
D
HELP ME OUT PLEASE:))

Answers

C is your correct answer on this one

Answer:

Step-by-step explanation:

x=-3 and y=5

f(-3)=5

make x the subject of the formula


x/2c = a + 4

Answers

Answer:

x=8c

or

x=8

Step-by-step explanation:

Hope that helps :)

Reese is seven years younger than Emily. If the sum of their ages is 37, find the age of each girl. 1 SEE ANSWER

Answers

Answer:

Reese: 15

Emily: 22

Step-by-step explanation:

22 - 7 = 15

15 + 22 = 37

Find the common solution.

x = - y + 10
x = y + 4

Type answer as an ordered pair.

Answers

Answer:

Step-by-step explanation:

x = -y + 10

Substitute into the second equation

-y + 10 = y + 4

-2y = -6

y = 3

Plug into first or second equation.

x = -3 + 10 = 7

x = 3 + 4 = 7

So the ordered pair is (7,3)

PLS HELP ME PLS I WILL GIVE BRAINLIEST

Answers

Answer:

It will be A

Step-by-step explanation:

M=140-100/5-3

m=40/2

m=20

H e l p p l e a s e.......................................................................

Answers

Answer:

f=4x-148

62 degrees fahrenheit

Step-by-step explanation:

Chirps per minute=148

x=148

x=4f-148

100=4f-148

248=4f

62=f

If snowy tree crickets chirp at 100 chirps per minute, the temperature outside is 62 degrees fahrenheit.

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