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kirill115 [55]
3 years ago
15

Can someone PLEASE help me solve these last 2 problems so I can be done with this math class....really stumped on these 2....

Mathematics
1 answer:
dexar [7]3 years ago
3 0
Both distances 3966 and 4746 were done in 6 hours, so the speeds are:
speed against wind = 3966/6=661 km/h (difference of airplane and wind)
speed with wind = 4746/6=791 km/h (sum of airplane and wind)

The speed of airplane is greater than that of the wind, so this is a sum and difference problem.

Greater speed (plane) = (sum+difference)/2=(791+661)/2=726 km/h
Lesser speed (wind) = (sum-difference)/2 = (791-661)/2 = 65 km/h

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Geometry math question
kobusy [5.1K]

the answer that you are looking for is d

8 0
3 years ago
If 20% of the people who shop at a local grocery store buy apples, what is the probability that it will take no more than 5 cust
Leokris [45]

Answer:

C) Using a random digits table select one digit numbers where 0-1 is a customer who buys apples and 2-9 is a customer who does not. Keep selecting one digit numbers until you get a 0 or 1. Record the number of digits selected.

Step-by-step explanation:

There are 10 digits from 0 to 10

0-1 are 2 out of 10

2/10 × 100 = 20%

Therefore 20% chance of buying apples

5 0
3 years ago
What's is the answer to the equation 4(x+7)=9(x-1)+22 ?
Aleks [24]
Hello, there!

What's the answer to the equation 4(x + 7) = 9(x - 1) + 22 


Answer: x = 3
------------------------------------------------------------------------------------------------------

Explanation:


First, let's simplify this
4 * x = 4x

4 * 7 = 28

Now, we have 4x + 28 = 9(x - 1) + 22

Now, let's simplify the right side by using the distributive property as well.

9 * x = 9x

9 * -1 = -9

Now, we have 4x + 28 = 9x -9 + 22

Let's combine like terms on the right side

-9 + 22 = 13

Npw, we have 4x + 28 = 9x + 13

Let's isolate the x. To do this, we will first subtract 28 from each side.

4x + 28 = 9x + 13
       -28           -28

4x = 9x - 15

Now, we will subtract 9x from each side.

4x = 9x - 15
-9x   -9x

-5x = -15

Now, we will multiply each side by -1 to make x a positive number.

-5x = -15
*-1    *-1

5x = 15

Finally, we will simplify this completely. To do this, we will divide each side by 5.

5x = 15
---    ----
 5      5

x = 3


Our final answer is x = 3


I hope I helped!

Let me know if you need anything else!

~ Zoe
7 0
4 years ago
Find the measurement of<br> an interior angle of a regular<br> decagon (10-sided figure).
natita [175]

Answer:

144°

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Geometry</u>

  • Sum of Angles: 180(n - 2)

Step-by-step explanation:

<u>Step 1: Define</u>

Number of sides <em>n</em> = 10

<u>Step 2: Find</u>

  1. Substitute:                    180(10 - 2)
  2. Subtract:                       180(8)
  3. Multiply:                        1440°

<u>Step 3: Find 1 angle</u>

<em>We have 10 sides.</em>

  1. Divide:                    1440/10 = 144
8 0
3 years ago
5m +4 -7m = 10<br><br> what is m?
tino4ka555 [31]
-2m + 4 = 10
-2m = 6
m=-3

M would be -3
8 0
3 years ago
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