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ruslelena [56]
4 years ago
14

PLZZ HELP! WILL MARK BRAINLIEST!!

Mathematics
1 answer:
joja [24]4 years ago
7 0

Answer:

Step-by-step explanation:

Neptune is about 2,700,000,000 miles from Earth.

Mercury is about 135,000,000 miles from Earth.

A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10. The power is the number of decimal places you move.

1) 2,700,000,000 = 2.7 x 10^{9}

      135,000,000  = 1.35 x 10^{8}

2)

        \frac{Neptune}{Mercury} = \frac{2.7*10^{9} }{1.35*10^{8}}

You can see there is only one extra 0 on top, the rest will cancel so you have:

\frac{27}{1.35}  = 20

It's 20x farther to Neptune from Earth, than it is to Mercury from Earth.

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Solve this system of equations using substitution, show your work (ANSWER QUICK PLEASE)
melisa1 [442]

Answer:

\boxed{\sf{y=-50 \quad x=3}}

Step-by-step explanation:

Isolate the term of x and y from one side of the equation.

<h3>y=-15x-5 and 11x+y=-17</h3>

First, you have to substitute.

\sf{y=-15x-5=11x-15x-5=-17}

Then, you solve.

\sf{-4x-5=-17}

Add by 5 from both sides.

-4x-5+5=-17+5

Solve.

-17+5=-12

-4x=-12

Divide by -4 from both sides.

-4x/-4=-12/-4

Solve.

-12/-4=3

<u>x=3</u>

y=-15*3-5


Solve.

PEMDAS stands for:

  • Parenthesis
  • Exponents
  • Multiply
  • Divide
  • Add
  • Subtract

15*3=45

Rewrite the problem down.

y=-45-5

Solve.

<u>y=-50</u>

<u>Therefore, the correct answer is y=-50 and x=3.</u>

I hope this helps you! Let me know if my answer is wrong or not.  

3 0
2 years ago
Dmitry runs 3.1 miles on Saturday,shown by the model. He runs 2.45 on Sunday. How much farther does he run on Saturday
Amiraneli [1.4K]

Answer:

0.65 miles.

Step-by-step explanation:

Dmitry runs 3.1 miles on Saturday.

He runs 2.45 miles on Sunday.

On Saturday he runs 3.1 - 2.45 = 0.65 miles farther.

7 0
3 years ago
Read 2 more answers
Ms. Ironperson lives due east from the shawarma mediterran grill and Mr. Thoro lives due south. Both leaves at the same time, ms
Allisa [31]

Correct question is;

Ms. Ironperson lives due east from the shawarma mediterran grill and Mr. Thoro lives due south. Both leaves at the same time, ms.Iron person traveling at 50 mph and mr. Thoro at 60 mph. Calculate when they would be 400 miles apart and how long would it take to happen

Answer:

They will be 400 miles apart when Ms. Ironperson has covered 256 miles and Mr. Thoro has covered 307 miles after 5.12 hours

Step-by-step explanation:

Since Ms. Ironperson lives due east from the shawarma mediterran grill and Mr. Thoro lives due south,then the distance between them will be the hypotenuse of a right angle triangle.

Now, we are told that Ms. Ironperson is traveling at 50 mph and that Mr. Thoro is traveling at 60 mph.

Thus, if we want to find when they would be at 400 miles apart, it means we have to find the distance Ms. Ironperson and Mr. Thoro would have covered after a time "t".

Thus,

Ms. Ironperson covered 50t miles

Mr. Thoro covered 60t miles

Therefore, since their location forms a right angled triangle, then we can use pythagoras theorem and we have;

(50t)² + (60t)² = 400²

This gives;

2500t² + 3600t² = 160000

6100t² = 160000

t² = 160000/6100

t = √(160000/6100)

t ≈ 5.12 hours

Thus, for Iron person, distance covered is: 50 × 5.12 = 256 miles

For Mr. Thoro, distance covered is: 60 × 5.12 ≈ 307 miles.

They will be 400 miles apart when Ms. Ironperson has covered 256 miles and Mr. Thoro has covered 307 miles after 5.12 hours

8 0
3 years ago
HGELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
Anna [14]

Answer:

15 inches

Step-by-step explanation:

The formula for the area of  the area of a triangle is bxh/2.

The base is 6 inches, and the height is 5 inches. 6x5=30. 30/2=15.

Would appreciate if you marked my answer as brainliest, have a good day :)

7 0
3 years ago
In the past 6 6 days, Adrion's travel time to school has varied: 22 22 minutes, 27 27 minutes, 34 34 minutes, 29 29 minutes, 20
aleksklad [387]

Answer:

6

,

22

,

27

,

34

,

29

,

20

,

18

 has more than one absolute value, which means that it can't be written as piecewise.

Step-by-step explanation:

6

,

22

,

27

,

34

,

29

,

20

,

18

 can't be written as piecewise.

3 0
4 years ago
Read 2 more answers
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