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Kruka [31]
3 years ago
12

You can mow one acre in 126 minutes. i can mow one acre in 117 minutes. how long will it take you to mow a 0.17-acre lawn? 13 in

correct: your answer is incorrect. minutes how long will it make me to mow the same lawn? 17 incorrect: your answer is incorrect. minutes if we mow the lawn together, how long will it take us? 30 incorrect: your answer is incorrect. minutes
Mathematics
1 answer:
Morgarella [4.7K]3 years ago
5 0

a) (0.17 ac)×(126 min/ac) = 21.42 min

b) I can mow 1/126 ac/min; you can mow 1/117 ac/min. Together, we can mow at a rate that is the sum of these:

... (1/126 + 1/117) ac/min = (117 + 126)/(126×117) = 243/14,742 ac/min

Then it will take 14,742/243 min/ac × 0.17 ac/lawn ≈ 10.31 min/lawn

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1 + 2k = 5k + 7 I got k=2 don't know if it's the right answer ?
DochEvi [55]
You are close, but it is not the correct answer.

1 + 2k = 5k + 7

First, since we are trying to get the variable by itself, we need to move all things to one side. Let's subtract 1 from each side. 
2k = 5k + 7 - 1

Second, we can now subtract (7 - 1) to get 6. Let's add that into our problem and then subtract 5 from each side, still trying to get the variable by itself.
2k - 5k = 6

Third, subtract (2k - 5k) to get -3k. Hint the negative symbol now. If the problem were switched the other way, it would still be a positive. 
-3k = 6

Fourth, we can now divide each side by -3. This results in a fraction and also getting the variable by itself on one side of the problem. Remember the negative sign in front of the fraction since (-3) carried it.
k = - \frac{6}{3}

Fifth, this is our last step. We need to simplify the fraction. Since out fraction is 6/3, which number multiples by 3 to get the answer of 6? The answer is 2, since (3 × 2 = 6). Don't forget the negative!
k = -2

Answer: \fbox {k = -2}
4 0
4 years ago
Three more than the product of two and a number
Sati [7]

Answer:

2x+3

Step-by-step explanation:

+3 " three more than"

2x " the product of two and a number"

2x+3 " three more than the product of two and a number"

8 0
3 years ago
Please help me i dont know how to do any of this
Valentin [98]
I think its... A (but not sure)
3 0
4 years ago
What does an isometric transformation do?
BaLLatris [955]

Answer:

Option: B is correct.

( Preserves the shape and size of the figure )

Step-by-step explanation:

  • An ISOMETRIC TRANSFORMATION (RIGID MOTION) is a transformation that preserves the distances and/or angles between the pre-image and image.
  • The isometric transformations are reflection, rotation and translation and combinations of them such as the glide, which is the combination of a translation and a reflection.

Hence, option B is correct.

Preserves the shape and size of the figure.

4 0
3 years ago
Read 2 more answers
2x - 4y = -8<br> Solve for y <br><br><br> Need help ASAP!
goldenfox [79]

Answer:

y = 1/2x + 2

Step-by-step explanation:

  • 2x - 4y = -8

<u>Solving for y in steps:</u>

  • 2x - 4y + 8 + 4y= 4y
  • 2x + 8 = 4y
  • x + 4 = 2y
  • y = x/2 + 4/2
  • y = 1/2x + 2
7 0
4 years ago
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