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masya89 [10]
3 years ago
14

Working alone, Darryl can mop a warehouse in 11 hours. Elisa can mop the same warehouse in 9

Mathematics
1 answer:
Harrizon [31]3 years ago
3 0

Answer:

  • ≈ 5 hours

Step-by-step explanation:

<u>Time needed if they work together:</u>

  • 1 / (1/11 + 1/9) =
  • 1/ (20 / 99) =
  • 99/20 ≈ 5 hours
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Tawnee is designing a playground in the shape of a rectangle. If Tawnee increases the length and width of the playground by a sc
svetlana [45]

Answer:

We conclude that If Tawnee increases the length and width of the playground by a scale factor of 2, the perimeter of the new playground will be twice the perimeter of the original playground.

Step-by-step explanation:

We know that the perimeter of a rectangle = 2(l+w)

i.e.

P = 2(l+w)

Here

  • 'l' is the length
  • 'w' is the width

Given that the length and width of the playground by a scale factor of 2

A scale factor of 2 means we need to multiply both length and width by 2.

i.e

P = 2× 2(l+w)

P' = 2 (2(l+w))

    = 2P      ∵ P = 2(l+w)

Therefore, we conclude that If Tawnee increases the length and width of the playground by a scale factor of 2, the perimeter of the new playground will be twice the perimeter of the original playground.

4 0
3 years ago
Read 2 more answers
Multiply the following polynomials and write your final answer in standard form (x+3) (x^2-2x-1)
Naddika [18.5K]

Answer:

The answer is 4x^2-8x-2

Step-by-step explanation:

Distribute 3 to all the numbers on the other parenthesis and the answer would be: 3x^2-6x-3

Now distribute x to that same parenthesis which would be like distributing one so it will be kept the same: x^2-2x-1

Now combine like terms:

3x^2-6x-3

x^2-2x-1

= 4x^2-8x-2

(hope this helps, sorry if I'm wrong)

3 0
3 years ago
Please help asap! i need to pass this test
barxatty [35]

Answer:

i think its b or c i had this before so i might have forgoten

Step-by-step explanation:

8 0
3 years ago
Use the commutative property to write an equivalent expression 4(6) =
denpristay [2]

Answer:

this is an easy one. 6(4)

Step-by-step explanation:

since multiplication can be switched and you get the same answer, you can switch this using the communative property and you still get 24

7 0
3 years ago
What is the answer<br> 3x-4=2x+1
Vinil7 [7]

Answer:

Let's solve your equation step-by-step.

3x−4=2x+1

Step 1: Subtract 2x from both sides.

3x−4−2x=2x+1−2x

x−4=1

Step 2: Add 4 to both sides.

x−4+4=1+4

x=5

Answer:

x=5

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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