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Andru [333]
3 years ago
15

Sally can paint a room in 7 hours while it takes Steve 6 hours to paint the same room. How long would it take them to paint the

room if they worked together.
Mathematics
1 answer:
mash [69]3 years ago
5 0
Sally paints at a rate of 1/7th room / hour

Steve paints at a rate of 1/6th room / hour

If they both painted together, they would paint 1/7 + 1/6 = 13/42 room/hour

so to paint the whole room, it would take 1/(13/42) = 42/13 =
<u>
3.23 hours (3 significant figures)</u>
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3, 4, 5, 7, 9, 10, 2, 8<br><br> Mean__<br> Median__<br> Mode__<br> Range__
STatiana [176]

Mean- 6

Median- 6

Mode- 3, 4, 5, 7, 9, 10, 2, 8

Range- 8

Hope this Helped! :T

3 0
3 years ago
Read 2 more answers
If x is equal to 9 and y is equal to -3, then what is the value of…….? x - 9y - 3x + 6y -13?
Vesnalui [34]

We are given –

  • x =9
  • y = -3

Now put the values –

\qquad \twoheadrightarrow\bf x - 9y - 3x + 6y -13

\qquad \twoheadrightarrow\sf  9 -(9 \times -3) -(3 \times 9) +(6 \times -3) -13

\qquad \twoheadrightarrow\sf  9 + 27 -27 -18 -13

\qquad \twoheadrightarrow\sf  9 +\pink{\cancel{27}}-\pink{\cancel{27}} -31

\qquad \twoheadrightarrow\bf-22

  • Henceforth, value of x - 9y - 3x + 6y -13 is -22.

________________________________________

8 0
2 years ago
1. Simplify the expression. Assume that
ololo11 [35]

Answer:

b. 6|x|

Step-by-step explanation:

√(36x²) = √36√(x²)= 6|x|

Because √ from the number can be only positive.

5 0
3 years ago
Which are diagonals through the interior of the cube?<br> Select all the apply
Gennadij [26K]

Answer:

AH

Step-by-step explanation:

From the figure we can see a cube ABCDEFGH.

In a cube thee are 4 interior diagonals

To find the diagonal of the cube

AH, BG, CF   and DE

There are 4 interior diagonals.

The given options contain only one interior diagonal.

Therefore the correct answer is first option. AH

5 0
4 years ago
4x(x-25)=0 how to solve the quadratic equations using any of the four methods?​
butalik [34]

Answer:

x=25 or x=0

Step-by-step explanation:

4x(x−25)=0

Step 1: Simplify both sides of the equation.

4x2−100x=0

For this equation: a=4, b=-100, c=0

4x2+−100x+0=0

Step 2: Use quadratic formula with a=4, b=-100, c=0.

x=−b±√b2−4ac over 2a

x=−(−100)±√(−100)2−4(4)(0) over 2(4)

x=100±√10000 over 8

x=25 or x=0

7 0
3 years ago
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