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
earnstyle [38]
2 years ago
12

4(4 -8n) -7n = -30 + 7n

Mathematics
2 answers:
mestny [16]2 years ago
8 0

Answer:

n=1

Step-by-step explanation:

Use the distributive property to multiply 4 by 4−8n.

16−32n−7n=−30+7n

Combine −32n and −7n to get −39n.

16−39n=−30+7n

Subtract 7n from both sides.

16−39n−7n=−30

Combine −39n and −7n to get −46n.

16−46n=−30

Subtract 16 from both sides.

−46n=−30−16

Subtract 16 from −30 to get −46.

−46n=−46

Divide both sides by −46.

n=−46/−46

Divide −46 by −46 to get 1.

n=1

SashulF [63]2 years ago
4 0

Answer: n = 1

Step-by-step explanation:

Using the distributive law, multiply 4 by what's in the bracket.

(4)(4) -(8n)(4) -7n = -30 + 7n

16 -32n -7n = -30 + 7n

Group all like terms together. Once a (+ve) number goes over the equal sign it now becomes a (-ve) number, vise versa.

16 +30 = 32n + 7n + 7n

46 = 46n

Now we need to find for n. 46n can also be written as 46 multiply by n. When a multiplication sign goes over the equal sign, the sign changes to a division sign.

46 = 46n

46/46 = n

1 = n

You might be interested in
A plane flying over the ocean is on course to land on an aircraft carrier. The diagonal distance between the plane and the aircr
fomenos

Answer:

the plane's current height above the ocean is 3.42 miles

Step-by-step explanation:

Given that the diagonal distance between the plane and the aircraft carrier is 10 miles.

What we need to find is the vertical distance between the plane and the aircraft carrier which is the plane's current height above the ocean. This can be gotten using sine rule.  

For sine rule, you need a side and its opposite angle. For this question the triangle formed is a right angle triangle with diagonal distance, vertical distance and horizontal distance.

let a = diagonal distance = 10 miles

let the opposite angle to the diagonal distance be A = 90° (right angle)

let the vertical distance = b

let the opposite angle to the vertical distance be B = 20°

Sine rule states that    \frac{a}{sin(A)}  =  \frac{b}{sin(B)}

∴   \frac{10}{sin(90)}  =  \frac{b}{sin(20)}

b  =  sin(20)\frac{10}{sin(90)}

b  =  0.342*\frac{10}{1}

⇒ b = 3.42 miles

Therefore the plane's current height above the ocean is 3.42 miles

4 0
3 years ago
A pretzel has a mass of 5 grams. What is its mass in milligrams?
4vir4ik [10]
The answer is C because if you convert it gives you 50
3 0
3 years ago
-2 8/9 as a decimal and how to get it
slavikrds [6]

Answer: -2.88889

Step-by-step explanation:

calculate the approimate value

8 0
3 years ago
Please need help on this
Aleonysh [2.5K]
The answer is 1/3 is the answer.

4 0
3 years ago
Tyler walked 6 miles in 3 hours. What was his walking rate in miles per hour
BARSIC [14]

Answer:

This comes out to 2 mph.

Step-by-step explanation:

Reduce the following fraction:

 6 miles

---------------

  3 hours

This comes out to 2 mph.

8 0
3 years ago
Other questions:
  • 4fraction that are equal to 1/3
    5·1 answer
  • 4(x+4)=2(x+2)
    14·1 answer
  • What digit 0-9 does not appear in the first 30 digits of pi
    11·1 answer
  • The answer and I don't get it
    13·1 answer
  • Which is the graph of g(x)?
    14·1 answer
  • Evaluate: (2.3)2 <br><br> I need help fast !!!!!!!!!!!!!!!!
    15·2 answers
  • Can someone help me?
    14·1 answer
  • Question 1 (1 point)
    15·2 answers
  • 'calcula que signo tiene el producto de cien números enteros, sabiendo que 27 de ellos son positivos y que ninguno es cero''.
    10·1 answer
  • Find the length of the hypotenuse.<br><br><br><br> Use Pythagoras' theorem c2 = a2 + b2
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!