1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ilya [14]
3 years ago
6

When a number is decreased by 45%, the result is 9. What is the original number to the nearest tenth?

Mathematics
1 answer:
Paul [167]3 years ago
3 0

Answer:

16.4

Step-by-step explanation:

To decrease a number by 45% of its value, you subtract the 45%. To get 45%, you multiply the number by 0.45.

So, if x is the original number, then the equation for this word problem would be x - 0.45x = 9.

To solve, we first subtract 0.45x from x, which is 0.55x. This means that 0.55x is equal to 9. To simplify, we can divide both sides by 0.55. 9/0.55 is 16.36363636..., etc. The nearest tenth would be 0.4, so your answer is 16.4

You might be interested in
It costs a publishing company $0.55 to print one copy of a certain novel. This company paid $725,000 for the rights to the novel
Dmitrij [34]

Answer:

The correct answer is b. 116,900

The publishing company must sell 116,900 copies of the book to break even.

Step-by-step explanation:

Each book costs 0.55 to make and the company can sell it at 6.75, which means that the company earns 6.20 from each book, this is called the net value. If you divide the amount htat the company paid for the rights by the net value you can find the total number of copies that the company has to sell to break even.  

# books = $725,000/$6.20 = 116935 or approximately 116900 copies of the book.

8 0
3 years ago
Chloe swam 40 laps in the pool, but this was only 50% of her total swimming workout. How many more laps does she still need to s
Alja [10]
She has to 40 more laps. 50% is a half, so 40 is half of something. so you are dividing 40 by a half, which is 80. half of 80 is 40.
6 0
3 years ago
Find the given higher-order derivative.<br><br> f''(x) = 9- 3/x<br><br> f'''(x)=
Genrish500 [490]

Answer:

f'''(x)=\frac{3}{x^{2}}

Step-by-step explanation:

We are given with Second-order derivative of function f(x).

f''(x)=9-\frac{3}{x}

We need to find Third-order derivative of the function f(x).

f''(x)=9-\frac{3}{x}=9-3x^{-1}

We know that,

f'''(x) = (f''(x))'

So,

f'''(x)=\frac{\mathrm{d}\,f''(x)}{\mathrm{d} x}

f'''(x)=\frac{\mathrm{d}\,(9-3x^{-1})}{\mathrm{d} x}

f'''(x)=\frac{\mathrm{d}\,9}{\mathrm{d} x}-\frac{\mathrm{d}\,3x^{-1}}{\mathrm{d} x}

f'''(x)=0-3\frac{\mathrm{d}\,x^{-1}}{\mathrm{d} x}

f'''(x)=-3(-1)x^{-1-1}

f'''(x)=3x^{-2}

f'''(x)=\frac{3}{x^{2}}

Therefore, f'''(x)=\frac{3}{x^{2}}

4 0
4 years ago
What is the equation of the line parallel to 3x + 2y = -4 that goes through the point (4, -1)?
Basile [38]

Answer:

y=-3/2x+5

Step-by-step explanation:

3x + 2y = -4

2y=-4-3x /:2

y=-4/2-3x/2

y=-3/2x-2

Slope=-3/2(=m) , because this line is parallel slope is the same, then

y-y1=m(x-x1) ,where

A(4,-1).... x1 =4, y1 =-1

y-(-1)=-3/2(x-4)

y+1=-3/2x+3/2*4

y+1=-3/2x+6

y=-3/2x+6-1

y=-3/2x+5

7 0
4 years ago
The population in the town increased 5000 million per year. if the population is 120000 three years ago.. what is the population
gogolik [260]

Answer:

The population will be 135000

5000 x 3 = 15000

Then you add 120000 with 15000

6 0
3 years ago
Other questions:
  • What figure must have four right angles
    9·2 answers
  • Line A <br> Line B<br> Or Line C<br> Or D?<br> Thanks to whoever helps (:
    10·2 answers
  • Solve equation 14-(p-8)
    9·1 answer
  • Solve for x x-4=-7. Please
    15·1 answer
  • Pls help will give brainlist
    12·1 answer
  • Estimate a 15% tip on a dinner bill of $67.48 by rounding the bill amount to the nearest ten dollars
    11·1 answer
  • What is the slope of the line that contains the points (-2, 2) and (3, 4)?
    14·1 answer
  • What is the approximate value of 12−−√ ?<br><br><br> 3.5<br><br><br> 2<br><br><br> 6<br><br><br> 4.5
    15·1 answer
  • Which matrix multiplication is defined ?
    5·1 answer
  • Please Help me solve this (Who ever answers correctly will get brainlest)+(a lot of points)
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!