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
wel
3 years ago
9

Simplify -9(1-10n) - 2(3n+9)

Mathematics
1 answer:
agasfer [191]3 years ago
4 0

Answer:

3 (28 n - 9)

Step-by-step explanation:

Simplify the following:

-9 (1 - 10 n) - 2 (3 n + 9)

-9 (1 - 10 n) = 90 n - 9:

90 n - 9 - 2 (3 n + 9)

-2 (3 n + 9) = -6 n - 18:

90 n + -6 n - 18 - 9

Grouping like terms, 90 n - 6 n - 18 - 9 = (90 n - 6 n) + (-9 - 18):

(90 n - 6 n) + (-9 - 18)

90 n - 6 n = 84 n:

84 n + (-9 - 18)

-9 - 18 = -27:

84 n + -27

Factor 3 out of 84 n - 27:

Answer: 3 (28 n - 9)

You might be interested in
Please help thank you!
Arte-miy333 [17]

Answer:

  • golf: $10
  • batting: $2.50

Step-by-step explanation:

We can write two equations in the two unknowns using the given relations. Let g and b represent the costs of a round of golf and a turn in the batting cage, respectively.

  5g +4b = 60 . . . . . Sylvester's expense

  3g +6b = 45 . . . . . Lin's expense

Dividing the second equation by 3 gives ...

  g +2b = 15   ⇒   2b = 15 -g

Substituting into the first equation, we have ...

  5g +2(2b) = 60

  5g +2(15 -g) = 60 . . . . . substitute for 2b

  3g = 30 . . . . . . . . . subtract 30, collect terms

  g = 10 . . . . . . . divide by 3

__

  2b = 15 -10 = 5 . . . . use the value of g to find b

  b = 2.5 . . . . . . . . divide by 2

Mini golf costs $10 per round; batting cages cost $2.50 per turn.

7 0
2 years ago
PLEASE HELP!! URGENT!!!! UNIT TEST!!!!
slavikrds [6]

ANSWER

y=-\frac{4}{3}x+\frac{16}{3}


Or

3y+4x=16


EXPLANATION


Let us find the gradient of the line:

-3x+4y=4 by rewriting it in the slope intercept form.


\Rightarrow 4y=3x+4


We divide through by 4 now;


\Rightarrow y=\frac{3}{4}x+1


This is now in the form;

y=mx+c

where

m=\frac{3}{4} is he slope.


This implies that the slope of the line that is perpendicular to this line will be the negative reciprocal of m=\frac{3}{4} .


Thus the perpendicular line has slope,

m=\frac{-1}{\frac{3}{4}}= -\frac{4}{3}.


Let the perpendicular line have equation,


y=mx+c

When we substitute the slope we have;


y=-\frac{4}{3}x+c

We substitute the point. (4,0) to find c.


0=-\frac{4}{3}(4)+c


0=-\frac{16}{3}+c


\frac{16}{3}=c

We substitute c to obtain;


y=-\frac{4}{3}x+\frac{16}{3}


Or

3y+4x=16

7 0
3 years ago
Read 2 more answers
56 is decreased to 11
nexus9112 [7]

Answer:

56 decreases to 11 because 45 was subtracted from it.

56-45=11


4 0
3 years ago
Read 2 more answers
Does the system have one, none or infinite solutions?<br> 8x + 4y = 12<br> y = -2x + 3
Vitek1552 [10]

Answer:

Infinite solutions

Step-by-step explanation:

6 0
3 years ago
I recently scraped the overhang at a fast food resterant causing damage that appeared very minor while driving a Uhaul rented my
Sauron [17]

I think that you are reliable


3 0
3 years ago
Other questions:
  • Claudio Walked (3/10 mile in the morning. He walked the same distance in the afternoon. How far did Claudio walk altogether
    11·1 answer
  • In which quadrant does the terminal side of the angle 215° lie?
    5·1 answer
  • At a 20th high school reunion, all the classmates were asked the number of children they had. The probability of having a partic
    9·1 answer
  • Arc length
    14·1 answer
  • Wilson made punch from a recipe that called for 1 and 1/2 cups of orange juice and 3/4 Cup lemonade. Wilson used 2 and 1/4 cups
    11·1 answer
  • The following table shows the length and width of two rectangles:
    8·1 answer
  • Solve the following System Of Equations Using Substitution or Elimination Methods. Show Work.
    7·1 answer
  • Solve <br><br> 270.6 is 16 1/2% of what number?<br><br><br> WILL GIVE BRAINLIST
    8·2 answers
  • Find the selling price of a $30 item after a 40% markup.
    14·1 answer
  • . Byron has 17 kilograms of black pepper. He uses a of the pepper
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!