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
nekit [7.7K]
3 years ago
13

Can someone help me i keep getting different answer!!

Mathematics
1 answer:
spayn [35]3 years ago
6 0

Answer:

The second option: 3 (6 - 5n)/20n

Step-by-step explanation:

Make sure all fractions have a common denominator:

Step 1. Find a common multiple between all three denominators

5, 4, and 10 all have a common multiple of 20. Proof: 5 × 4 = 20, 4 × 5 = 20, and 10 × 2 = 20

Step 2. Multiply the denominators to get to 20. Whatever you do to the bottom (denominator) must be done to the top (numerator).

1/5n × 4/4 = 4/20n

3/4 × 5n/5n = 15n/20n

7/10n × 2/2 = 14/20n

Your fractions now all have a common denominator of 20n.

Rewrite the equation using the new fractions:

4/20n - 15n/20n + 14/20n

Only focus on adding/subtracting the numerators; the denominators will stay the same: 20n.

(4 - 15n + 14)/20n

Combine like terms:

(18 - 15n)/20n

Factor out any numbers possible:

3(6 - 5n)/20n

Note* 3 go into both 18 and 15, which allows us to factor 3 out. 18 ÷ 3 = 6 and 15 ÷ 3 = 5, giving us our new numbers inside the parentheses.

You might be interested in
Which numbers are solutions to the equation 30=x2
GaryK [48]

Answer:

x = +√30

Step-by-step explanation:

Please write 30 = x squared as 30 = x^2.

If x^2 = 30, there are two solutions:  x = +√30 and x = -√30.

Several possible answers are given.    x=30−−√ is closest to the correct one, but must be written as x = √30.  Please ask someone how to find the "√" operator in Brainly.  Or, just write "sqrt(      )" instead.

6 0
3 years ago
How do you write polynomials in standard form
andre [41]
You put the highest exponent power first, then you go down until you reach a regular number (a number with a variable goes before a normal number)

Ex: 5x^3+2x^2+4x+5
6 0
3 years ago
Read 2 more answers
Frank and Gertrude mow lawns for extra money over the summer. Frank's income is determined by f(x) = 5x + 15, where x is the num
Zepler [3.9K]
H(x)=5x+15+4x+20

if x=4, together it would be 5(4)+15+4(4)+20
h(x)=20+15+16+20=71
Divided by 2, they'd each get 35.5

If Frank worked alone, he'd get 5(4)+15= 35
He'd make more working together. 
3 0
4 years ago
?Cuantos mililitros hay en 3 vasos 8.4 onzas cada uno?
cluponka [151]
29.57 mL =  1 onzas 
3 * 8.4 onzas = 25.2 onzas
29.57 mL * 25.2 onzas = 745.164 mL onzas
b) 745.1 mL Onzas
8 0
3 years ago
Read 2 more answers
How do I solve this graph
Sunny_sXe [5.5K]
Plug in two values for x, say, 0 and 1.  



Lets start with solving the equation when x=0.  

y=2(0)-3
y=0-3
y=-3.

So, when x=0, y=-3.  Graph (0, -3)

Next, x=1

y=2(1)-3
y=2-3
y=-1

So, when x=1, y=-1.  Graph (1,-1)

Draw a line between the two points, and that should be your answer!  Hope this helped :)

8 0
3 years ago
Read 2 more answers
Other questions:
  • 3 = x - 8<br> I need this right now plz
    9·2 answers
  • Using calculus, you can find a function’s maximum or minimum by differentiating and setting the result to zero. Do this for equa
    11·1 answer
  • What is the measure of angle BCD?<br><br> m∠BCD = degrees
    12·1 answer
  • Need help with Trigonometry!
    11·1 answer
  • Brenda is building a square fence. She places a fence post at (─3,2). What is the location of the post (in which quadrant) that
    6·1 answer
  • Is markup and selling price the same?
    7·2 answers
  • Please help me figure thus out. I thought I had it but it keeps telling me I'm wrong.
    9·1 answer
  • The manager of a snack bar buys bottled water in packs of 35 and candy bars in packs of 20. Then, she sells the items individual
    7·2 answers
  • Which function is best represented by this graph?
    5·2 answers
  • A student was asked to simplify the expression 2(x+3)+(4x−8)−7x .
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!