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jasenka [17]
3 years ago
8

PLEASE PLEASE HELP GIVING BRAINALIST AND EXTRA POINTS FOR FIRST PERSON

Mathematics
2 answers:
noname [10]3 years ago
8 0

Answer:

answers are below

Step-by-step explanation:

1. k = -12

2. x = 14

3. y = -18

4. x = 34/3 or 11.3333333

5. x = -10

6. b = 17

7. x = 1/7

8. y = -2

Hope this heps!! Tell me if you need any explanations :)

solniwko [45]3 years ago
6 0

Answer:

1. -12

2. 14

3. -18

4. 11 1/3

5. -1 3/5

6. -17

7. 1/7

8. 7 1/3

Step-by-step explanation:

Most of them should be right but sorry if wrong

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Washing his dad's car alone, eight-year-old Levi takes 2.5 hours. If his dad helps him, then it takes 1 hour. How long does it t
Dmitry [639]

Answer:

Levi's dad takes 1.67 hours to wash the car by himself

Step-by-step explanation:

* Lets explain how to solve the problem

- Levi takes 2.5 hours to wash his dad's car alone

- Levi and his dad take 1 hour to wash the dad's car together

∵ Levi takes 2.5 hours to wash the car alone

∴ The rate of Levi is 1/2.5 car/hr

∵ His dad takes x hours to wash the car alone

∴ The rate of his dad is 1/x car/hr

∵ They working together for 1 hour to wash the car

- The equation of the work is rate of Levi × t + rate of his dad × t = 1

∵ t is the time of working together

∵ t = 1 hour

∴ \frac{1}{2.5}(1)+\frac{1}{x}(1)=1========\frac{1}{2.5}+\frac{1}{x}=1

- Multiply both sides by 2.5x to cancel the denominators

∵ \frac{1}{2.5}(2.5x)=x=====\frac{1}{x}(2.5x)=2.5

∵ 1 × (2.5x) = 2.5x

∴ x + 2.5 = 2.5x

- Subtract x from both sides

∴ 2.5 = 1.5x

- Divide both sides by 1.5

∴ x = 5/3 ≅ 1.67

∵ x is the the time of his dad to wash the car alone

∴ Levi's dad takes 1.67 hours to wash the car by himself

3 0
3 years ago
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What is the answer to -3z > -4.5 ?
Pani-rosa [81]

Answer:

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Step-by-step explanation:

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Andycycles7kilometersduringeachtriptowork. HowmanytripswillAndyhavetomaketocycleatotalof21kilometers?
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Andy would have to make 3 trips in order to cycle 21 kilometers.
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3 years ago
Please help me answer this question
I am Lyosha [343]

9514 1404 393

Answer:

  D.  -17%

Step-by-step explanation:

The change from March to April is (April - March) = (100 -120) = -20. As a fraction of the March bill, that is ...

  -20/120 = -1/6

As a percentage, that change is ...

  -1/6 × 100% ≈ -16.667% ≈ -17%

The electric bill changed by about -17% from March to April.

_____

<em>Additional comment</em>

Water went up 4%; groceries went up about 14%, and restaurant changed by -15%.

The percentage change is found by ...

  % change = ((new amount)/(original amount) -1) × 100%

Above, we have rearranged this to ...

  % change = ((new amount) -(original amount))/(original amount) × 100%

8 0
2 years ago
Evaluate the factorial.<br> 11!
Dafna11 [192]

Answer:

The factorial of 11! is exactly 39916800

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The number of digits in 11 factorial is 8.

The factorial of 11 is calculated as below:

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Step-by-step explanation:

6 0
3 years ago
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